CN101632898B - Method and equipment for adsorbing CO2 in flue by utilizing microalgae and on-line detection method - Google Patents
Method and equipment for adsorbing CO2 in flue by utilizing microalgae and on-line detection method Download PDFInfo
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- CN101632898B CN101632898B CN2009100910129A CN200910091012A CN101632898B CN 101632898 B CN101632898 B CN 101632898B CN 2009100910129 A CN2009100910129 A CN 2009100910129A CN 200910091012 A CN200910091012 A CN 200910091012A CN 101632898 B CN101632898 B CN 101632898B
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Abstract
The invention discloses a method and equipment for adsorbing CO2 in a flue by utilizing microalgae and an on-line detection method. Microalgae seeds in a logarithmic phase and a nutrient solution are inoculated into a pipeline optical collector and cultured in a weight proportion of 1:5-15; flue gas is filled into the pipeline optical collector after being desulfurized and dedusted; under the push of a centrifugal pump, microalgae liquid flows in the pipeline; and then the microalgae liquid is cycled to return to the pipeline optical collector through a material mixing and gas exchanging device. The flue gas is treated by the method, thereby effectively overcoming the defects of larger water evaporation amount, easy overflow of CO2, low optical utilization rate and high demand of land resources. The method not only enables the microalgae liquid and the nutrient solution to be uniformly distributed, but also can solve the problem that the microalgae in the reactor sinks to attach a wall. A gas analysis device in the material mixing and gas exchanging tank can prevent bubbles from increasing in the pipeline to form a gas column, thereby avoiding obstructed microalgae liquid flowing. After a system is treated by the method, the efficiency of adsorbing and fixing the CO2 of the system can reach 35 percent.
Description
Technical field
The present invention relates to a kind of method and apparatus and online test method of utilizing carbon dioxide in the algae absorption from flue gas, more particularly, relate to a kind of method and apparatus and online test method of utilizing carbon dioxide in little algae absorption from flue gas.
Background technology
In in the past 400,000 years, CO in the atmosphere
2Concentration fluctuates between 180～280ppm all the time.To late period in 19th century, after the mankind begin to use fossil fuel on a large scale, CO in the atmosphere
2Concentration rises to present 430ppm.Along with the increase of industrial expansion and population, human society is discharged into the CO in the atmosphere
2Constantly increase CO in the year two thousand fifty atmosphere
2Concentration will be up to 850ppm.Along with CO
2Content is more and more higher, and it is more and more hotter that the earth will become, and human living environment will be seriously damaged.Jointly face the climate change challenge in the whole world, advance under the situation of the sustainable development of socio-economy, the energy and the environmental problem of being correlated with therewith become particularly important.
CO
2Catch and seal up for safekeeping definite reduction CO as the inter-governmental climate change committee of the United Nations (IPCC)
2One of method of discharging is paid close attention in recent years in the world especially, is placed in status energy-conservation, that the regenerative resource development and use are of equal importance.CO
2Emission-reduction technology is not only the technological means that solves the energy and environment problem, the infant industry development that the innovation of its technology also will drive " low-carbon economy " and extend thus.According to the property sort of existing technology, CO
2Catch with the Plugging Technology Applied means and be broadly divided into physics CO
2Fixation, chemical CO
2Fixation and biological CO
2The fixation three major types.Physics CO
2The fixation technology except the stability problem of burying and collection, purifying, concentrated cost are higher, potential the risk of the aspects such as underground water, stratum, marine biosphere and weather also.Chemistry CO
2Fixation often needs pure CO
2, and the CO of discharging
2Purity generally only has 10～20%, and this just needs expensive separation costs.Very thin Euglena is that growth and breeding is fastest in the world, utilizes the most effective plant of photosynthesis absorbing carbon dioxide, and in addition, it also has, and environmental suitability is strong, treatment effeciency is high, can regulate and control and easily and the advantage such as the Other Engineering technology is integrated.And can obtain efficient, three-dimensional, highdensity culture technique, admittedly produce a large amount of fronds behind the carbon simultaneously and have good value, therefore, biological CO
2Technique for fixing, especially very thin Euglena CO
2Fixation is main and the most effective solid carbon mode (as shown in Figure 1) on the current earth, have more environmental protection, economy, thoroughly, meet the unique advantage of nature circulation, provide a completely newly effective carbon pattern admittedly for the mankind solve the greenhouse gas emission problem.
In order to realize efficiently utilizing the CO in little algae absorption power plant or the cement plant flue gas
2, and obtain precisely and CO intuitively
2The online monitoring data of fixed rate just need to provide a reliable and controlled cultivation and monitoring system.Yet, carry out at present system's great majority of little algae large-scale farming take open raceway pond as main, utilize open pond as the cultivating system of little algae, the following several problems of main existence: 1. water evaporation quantity is large; 2.CO
2Overflow easily; 3. it is larger to be affected by the external environment, and disturbs such as microorganism etc.; 4. light utilization efficiency is lower, causes the cultivation density of little algae lower; 5. demand of land resources is higher.More than the 1st, 2 and 3 problem directly affected the fixed effect of little algae absorbing carbon dioxide and effective enforcement of Clean Development Mechanism (CDM) monitoring method thereof.
In recent years, the closed reactor is paid attention to more and more widely.The closed reactor can be understood as the cultivating system that a kind of sealing is provided to the growth of little algae, and in this system, most light directly do not contact (in the open cultivation system, light can directly contact with the cultivation liquid level) with the cultivation liquid level; But light can pass transparent reactor tube walls and then contact with little algae of cultivation.So airtight reactor does not allow or has limited greatly the direct exchange (carbon dioxide, oxygen) of gas, the erosion (dust, microorganism etc.) of pollutant in algae liquid and air.Compare the open cultivation system, airtight cultivating system has the possibility of higher yield, because it can provide better environment control.Compare the open cultivation system, the closed reactor has following advantage: (1) prevents or reduces pollution; (2) provide control good in the breeding process; (3) prevent the evaporation of moisture; (4) loss of minimizing carbon dioxide; (5) can obtain higher cell concentration and area output.
Summary of the invention
One of purpose of the present invention provides a kind of method and apparatus and online test method of utilizing carbon dioxide in little algae absorption from flue gas.
Two of purpose of the present invention is in order to overcome the shortcoming of existing open cultivation system, and a kind of sealed pipe type both culturing microalgae system is provided, and is used for power plant, cement plant or the flue gas CO of other factory
2Remove.
Three of purpose of the present invention arranges gas flow and analytical equipment by air inlet and outlet side in the both culturing microalgae system, and this system of Real-Time Monitoring utilizes little algae to remove CO in the flue gas
2Effect, and the carbon dioxide fixation rate of this system carried out CDM monitoring and counting statistics.
These and other objects of the present invention will and be described by following detailed description and be further reflected and described.
The present invention utilizes CO in little algae absorption from flue gas
2Method, in the closed pipeline bioreactor, carry out CO in the flue gas
2Directly contact with nutrient solution with little algae algae kind, described closed conduit optical collector is made by the good material of light transmission, its caliber is 10-30 centimetre, can be " U " type, ring-type or other shape that is suitable for circulating, and can be according to the actual treatment amount in parallel or the pipeline optical collector more than one group of connecting.
Further, the present invention utilizes the method for carbon dioxide in little algae absorption from flue gas, that little algae algae kind that will be in exponential phase is inoculated in the pipeline optical collector (1), nutrient solution is sent into this system by batch mixing and gas swap tank (2), the weight ratio of little algae algae kind and nutrient solution is 1: 5-1: 15, under the power-assisted of centrifugal pump (3) promotes, algae liquid flows in pipeline, will be through desulfurization, the flue gas of dedusting is injected closed conduit optical collector (1) via air inlet (13) with the speed of 500～1000 ml/min, makes the CO in the flue gas
2Directly contact with algae liquid, for the little algae in the pipeline optical collector provides carbon source; Again via batch mixing and gas swap tank (2) Additional nutrient solution, get rid of flue gas after treatment, be circulated back at last in the pipeline optical collector (1).Little algae described in the present invention can be very thin Euglena, Phaeodactylum tricornutum, chlorella, Chlorococcum, scenedesmus obliquus, haematococcus pluvialis, salt algae etc.; Described nutrient solution is inorganic nutrient solution, comprise inorganic nitrogen, Phos, macroelement, trace element, vitamin and water, wherein inorganic nitrogen can be one or both of ammonium chloride or urea, Phos is potassium dihydrogen phosphate, a great number of elements is one or more mixture of calcium, magnesium, iron, sodium salt, trace element is one or more mixture of manganese, cobalt, zinc, mantoquita, and vitamin is B
1, B
12One or more.
Further, the present invention utilizes the method for carbon dioxide in little algae absorption from flue gas, normally has by day under the sunshine condition, and algae liquid iterative cycles flows, and turns off centrifugal pump after the darkness, stops algae liquid and circulates intrasystem.If any special needs, under cloudy weather or when needing work night, can be by secondary light source be installed around the pipeline optical collector, give illumination compensation, for intrasystem little algae in the situation of natural lighting deficiency, more luminous energy is provided, still can carries out photosynthesis to ensure the little algae in the pipeline optical collector.
In the method for utilizing carbon dioxide in little algae absorption from flue gas of the present invention, the cultivating condition of little algae in bioreactor is:
Dissolved oxygen amount 0-20mg/L pH value 3.5-10
Temperature 15-33 ℃ of electricity led 0-199.9mS
About flow velocity 10-25 cel system pressure 1 atmospheric pressure.
Cultivating condition is preferably:
Dissolved oxygen amount 10-15mg/L pH value 3.5-5
Temperature 22-27 ℃ of electricity led 30-80mS
About flow velocity 12-16 cel system pressure 1 atmospheric pressure.
Little algae is a large amount of CO that absorb in system
2, utilize solar energy to carry out photosynthesis, the while releasing oxygen, in order to prevent excessive oxygen in intrasystem accumulation, under the effect of centrifugal pump 3, algae liquid is pushed to batch mixing and gas swap tank 2.When the dissolved oxygen content that monitors when dissolved oxygen detector 12 is higher than value range, start vavuum pump 7, detach gas in the system, reduce dissolved oxygen level, concentrated nutrient solution is added to batch mixing and the gas swap tank 2 from port 8, in the internal system cyclic process, for little algae provides necessary nutrient source.
The present invention utilizes the equipment of carbon dioxide in little algae absorption from flue gas, comprise pipeline optical collector 1, gas swap tank 2, centrifugal pump 3, shutoff valve 4, aerate head 5, switch valve 6, vavuum pump 7, air inlet 13, wherein, centrifugal pump 3 is connected in series with shutoff valve 4, pipeline optical collector 1, access air inlet 13 between shutoff valve 4 and pipeline optical collector 1, the other end of centrifugal pump 3 is connected with gas swap tank 2, and the upper end of gas swap tank 2 is connected with the other end of valve 4 and pipeline optical collector 1.At the switch valve 6 of the bottom of pipeline optical collector 1 connection as the mouth of gathering, be connected with nutrition on the gas swap tank 2 and add mouth 8, for subsequent use mouthful 9 of gas detection, air release mouth 10, sample tap 11, dissolved oxygen detector 12, air inlet 13 is connected with entrance point gas analyzer 17 and gas flowmeter 16; Be connected with port of export gas concentration detector 14 and gas flowmeter 15 on the air release mouth 10.
The online method that detects carbon dioxide in little algae absorption from flue gas of the present invention is to be connected with gas analyzer 17 after flue gas sources 18 is passed through conventional desulfurization, dust removal process, can detect online CO in the flue gas
2Concentration then by gas flowmeter 16, is carried out the integrating of instantaneous and integrated flux, and flue gas is through gas flowmeter 16, enters the pipeline optical collector 1 of both culturing microalgae system, the CO of system's air inlet end from port one 3
2Pass into total amount and flow into metering and CO by flue gas
2Concentration calculates.Be connected gas analyzer 14 at batch mixing with air release port one 0 place at gas swap tank 2 tops, the composition of the carbon dioxide and oxygen that this system of on-line monitoring discharges, gas detecting instrument 14 and gas flowmeter 15 series windings, this system of on-line monitoring discharges the flow of gas; Gas flowmeter 14 links to each other with computer respectively with 16 with gas analyzer 17, gas analyzer 15, after real-time online record flue gas passes into this both culturing microalgae system, and CO
2The real time data that is absorbed and fixes and integrating statistics thereof.
The present invention is connected with many group transparent pipeline optical collectors with gas exchange device by setting up a closed batch mixing, be little algae efficient absorption carbon dioxide, absorption efficiency and the accumulated quantity of Rapid Accumulation biomass and accurate measure carbon dioxide provide the high efficiency technical approach.Because the pipeline bioreactor that the inventive method adopts is based upon outdoor, being convenient to composition absorbs solar energy, promote the growth of little algae photosynthesis, thus be specially adapted to process the large flue gas of discharge capacity, and overcome effectively that the prior art water evaporation quantity is large, CO
2The defective that overflow easily, light utilization efficiency is low, demand of land resources is higher.With the inventive method algae liquid and nutrient solution are evenly distributed, also can avoid the adherent problem of frond sinking in the reactor, be conducive to the gas exchange.In batch mixing and gas swap tank, be provided with the gas resolver, the gas resolver is tube aerator, when being filled with an amount of gas, can strengthen the contact area of carbon dioxide and algae liquid, not only increased the gas-liquid exchange, prevented that simultaneously bubble from increasing the formation gas column in transparent pipeline, the inhibition of having avoided gas column that algae liquid is flowed and produces.For utilizing little algae to realize the industrial production activities of the Clean Development Mechanism (CDM) that industrial carbon dioxide reduces discharging, efficient technological approaches is provided, become the key core technology that industrial carbon dioxide reduced discharging and developed little algae resource.With the flue gas that the inventive method is processed, detect the system that draws and absorb and fixation of C O
2Efficient can reach 35%, the oxygen rich gas of discharge and frond also can carry out industry recycling.
Description of drawings
Fig. 1 is little algae photosynthesis fixation of C O in the prior art
2The mode schematic diagram.
Fig. 2 is the structural representation of duct type both culturing microalgae of the present invention system.
Fig. 3 is CO of the present invention
2The monitoring system schematic diagram of absorption and air release.
In Fig. 2 and Fig. 3: 1, pipeline optical collector; 2, batch mixing and gas swap tank; 3, centrifugal pump; 4, shutoff valve; 5, aerate head; 6, switch valve; 7, vavuum pump; 8, be used for nutrient solution and add mouth; 9, gas detects for subsequent use mouthful; 10, air release mouth; 11, sample tap; 12, dissolved oxygen detector; 13, CO
2Blow vent; 14, system outlet end gas concentration detector; 15, system outlet end gas flowmeter; 16, system's entrance point gas flowmeter; 17, system's entrance point gas analyzer; The flue gas sources of 18, process desulfurization, dedusting; 19, air release mouth.
Below in conjunction with embodiment the present invention is carried out concrete description.As known by the technical knowledge, the present invention can realize by other the embodiment that does not break away from its Spirit Essence or essential feature.Therefore, following embodiment with regard to each side, all just illustrates, and is not only.All within the scope of the present invention or the change that is equal in the scope of the present invention all be included in the invention.
The specific embodiment
Embodiment 1:
Utilize little algae to process the method for power plant or cement plant flue gas:
Little algae algae kind (being preferably very thin Euglena) that as shown in Figure 2, will be in exponential phase and nutrient solution are inoculated in the pipeline optical collector 1 by 1: 10 weight ratio and cultivate.The flue gas process desulfurization in power plant or cement plant, dedusting are afterwards via in the speed flow in pipes optical collector 1 of air inlet 13 with 500～1000 ml/min, for the little algae in the pipeline optical collector 1 provides carbon source.Under the power-assisted of centrifugal pump 3 promoted, algae liquid flowed in pipeline, via batch mixing and gas swap tank 2, is circulated back to pipeline optical collector 1.Under the sunshine condition, algae liquid iterative cycles flows by day; Turn off the work of centrifugal pump 3 night after the darkness, stop algae liquid and circulate intrasystem.For convenient maintenance to pipeline optical collector 1 and batch mixing and gas swap tank 2, in connecting pipe, be provided with shutoff valve 4, can hold back intrasystem liquid.Switch valve 6 among the figure carries out the control of gathering of algae liquid as the mouth of gathering, and also from then on mouth carries out emptying operation to this pipe-line system.
The control of both culturing microalgae condition:
This system is communicated with atmosphere, and therefore, its operating pressure is about 1 atmospheric pressure.In microalga cultivation process, according to different little algae provenances, in the condition and range value controlling system internal operation condition of table 1 restriction.
Table 1
Little algae is a large amount of CO that absorb in system
2, and utilize solar energy to carry out photosynthesis, the while releasing oxygen, in order to prevent that excessive oxygen is in intrasystem accumulation (excessive dissolved oxygen is unfavorable for the growth of little algae), therefore, under the effect of centrifugal pump 3, algae liquid is pushed to batch mixing and gas swap tank 2.When the dissolved oxygen content that monitors when dissolved oxygen detector 12 is higher than value range, start vavuum pump 7, detach gas system in, the reduction dissolved oxygen level.Concentrated nutrient solution adds mouth 8 from nutrient solution and is added to batch mixing and the gas swap tank 2, in the internal system cyclic process, for little algae provides necessary nutrient source.
We are with from sample tap 11 sampling, as the usefulness of the sample of various off-line datas monitorings.This system is to CO
2The analysis of the absorption of gas and the gas that discharges thereof is measured will be by being connected on respectively CO
2Gas flowmeter and the gas analyzer of gas inlet 13 and this system gas liberation port 10 are realized, carry out integrating and the record (seeing Fig. 3 for details) of gas gross by computer.
Power plant or cement plant flue gas can realize by the course of work shown in Figure 2 through absorbed metering behind the native system and efficiency analysis.Be connected with gas analyzer 17 after the desulfurization of flue gas sources 18 process routines, the dust removal process, can detect online CO in the flue gas
2Concentration then by gas flowmeter 16, is carried out the integrating of instantaneous and integrated flux, and flue gas is through gas flowmeter 16, enters the pipeline optical collector 1 of both culturing microalgae system from port one 3, for micro algae growth provides necessary carbon source.The such CO of this system's air inlet end
2Pass into total amount and can flow into metering and CO by flue gas
2Concentration calculates.
Be connected gas analyzer 14, the composition of the carbon dioxide and oxygen that this system of on-line monitoring discharges at batch mixing with air release mouth 10 places at gas swap tank 2 tops.Gas detecting instrument 14 and gas flowmeter 15 series windings, but this system of on-line monitoring discharges the flow of gas.Gas flowmeter 14 and 17, gas analyzer 15 links to each other with computer with 16, realizes real-time online record and calculating, after acquisition flue gas passes into this both culturing microalgae system, CO
2The real time data that is absorbed and fixes.
Because little algae absorbs CO
2Carry out photosynthetic speed and be subjected to the impact of algae kind character, nutritional condition and weather conditions larger, therefore, this system absorbs and fixation of C O
2Efficient between 10～35%.
Embodiment 2
Utilize very thin Euglena to process the method for power plant or cement plant flue gas:
The nutrient solution of very thin Euglena is according to the following formulation:
NH
4Cl 1600mg/L CO(NH
2)
2 60mg/L
KH
2PO
4 1500mg/L MgSO
4 400mg/L
CaCl
2 40mg/L Fe
2(SO
4)
3 10mg/L
Na
2EDTA 5mg/L MnCl
2 1.8mg/L
CoSO
4 1.5mg/L ZnSO
4 0.4mg/L
Na
2MoO
4 0.2mg/L CuSO
4 0.02mg/L
Cobastab
1The 3mg/L Cobastab
1225 μ g/L.
Very thin Euglena algae kind and the above-mentioned nutrient solution weight ratio with 1: 8 is inoculated in the pipeline optical collector, and liquid amount is 90%, and inoculation algae kind density is about 2 * 10
5Individual cells/ml, the flue gas in power plant or cement plant is passed through desulfurization, dedusting afterwards via in the speed flow in pipes optical collector 1 of air inlet 13 with 800 ml/min, for the little algae in the pipeline optical collector 1 provides carbon source, and control system pH is at 4-5, temperature is controlled at 24-26 ℃, and the power-assisted promotion by centrifugal pump 3 is flowed algae liquid in pipeline, via batch mixing and gas swap tank 2, be circulated back to pipeline optical collector 1.
Embodiment 3
Utilize chlorella to process the method for power plant or cement plant flue gas:
The nutrient solution prescription of chlorella cultivation:
KNO
3 1250mg/L KH
2PO
4 1250mg/L
MgSO
4·7H
2O 1000mg/L CaCl
2·2H
2O 111mg/L
Na
2EDTA 5mg/L FeSO
4·7H
2O 0.5mg/L
H
3BO
3 0.11mg/L ZnSO
4·7H
2O 0.09mg/L
MnCl
2·4H
2O 0.014mg/L MoO
3 0.007mg/L
CuSO
4·5H2O 0.016mg/L Co(NO
3)
2·6H
2O 0.005mg/L。
Chlorella algae kind and the above-mentioned nutrient solution weight ratio with 1: 10 is inoculated in the pipeline optical collector, and liquid amount is 90%, and inoculation algae kind density is about 5 * 10
5Individual cells/ml, the flue gas in power plant or cement plant is passed through desulfurization, dedusting afterwards via in the speed flow in pipes optical collector 1 of air inlet 13 with 600 ml/min, for the little algae in the pipeline optical collector 1 provides carbon source, and control system pH is at 8-9, temperature is controlled at 26-30 ℃, and the power-assisted promotion by centrifugal pump 3 is flowed algae liquid in pipeline, via batch mixing and gas swap tank 2, be circulated back to pipeline optical collector 1.
Utilize scenedesmus obliquus to process the method for power plant or cement plant flue gas:
The nutrient solution prescription of scenedesmus obliquus cultivation:
KNO
3 1250mg/L KH
2PO
4 1250mg/L
MgSO
4·7H
2O 1000mg/L CaCl
2·2H
2O 111mg/L
Na
2EDTA 5.00mg/L FeSO
4·7H
2O 0.50mg/L
H
3BO
3 0.11mg/L ZnSO
4·7H
2O 0.088mg/L
MnCl
2·4H
2O 0.014mg/L MoO
3 0.007mg/L
CuSO
4·5H
2O 0.016mg/L Co(NO
3)
2·6H
2O 0.005mg/L
Scenedesmus obliquus algae kind and the above-mentioned nutrient solution weight ratio with 1: 10 is inoculated in the pipeline optical collector, and liquid amount is 90%, and inoculation algae kind density is about 2 * 10
5Individual cells/ml, the flue gas in power plant or cement plant is passed through desulfurization, dedusting afterwards via in the speed flow in pipes optical collector 1 of air inlet 13 with 1000 ml/min, for the little algae in the pipeline optical collector 1 provides carbon source, and control system pH is at 8-9, temperature is controlled at 25-33 ℃, and the power-assisted promotion by centrifugal pump 3 is flowed algae liquid in pipeline, via batch mixing and gas swap tank 2, be circulated back to pipeline optical collector 1.
Embodiment 5
Utilize Dunaliella salina to process the method for power plant or cement plant flue gas:
The nutrient solution prescription of Dunaliella salina cultivation:
NaCl 29200mg/L KCl 200mg/L
KNO
3 1000mg/L MgCl
2·6H
2O 1500mg/L
MgSO
4·7H
2O 500mg/L K
2HPO
4 45mg/L
Tris-HCl 2450mg/L CaCl
2·2H
2O 200mg/L
Na
2EDTA 1.89mg/L EDTA-Fe 3.64mg/L
ZnSO
4·7H
2O 0.087.00mg/L H
3BO
3 0.61mg/L
CoCl
2·6H
2O 0.015mg/L CuSO
4·5H
2O 0.06mg/L
MnCl
2 0.23mg/L (NH
4)
6Mo
7O
24·4H
2O 0.38mg/L。
Dunaliella salina algae kind and the above-mentioned nutrient solution weight ratio with 1: 10 is inoculated in the pipeline optical collector, and liquid amount is 90%, and inoculation algae kind density is about 2 * 10
5Individual cells/ml, the flue gas in power plant or cement plant is passed through desulfurization, dedusting afterwards via in the speed flow in pipes optical collector 1 of air inlet 13 with 1000 ml/min, for the little algae in the pipeline optical collector 1 provides carbon source, and control system pH is at 8-9, temperature is controlled at 25-30 ℃, and the power-assisted promotion by centrifugal pump 3 is flowed algae liquid in pipeline, via batch mixing and gas swap tank 2, be circulated back to pipeline optical collector 1.
Utilize little plan ball algae to process the method for power plant or cement plant flue gas:
The nutrient solution of little plan ball algae is according to the following formulation:
NaCl 35g/L NaNO
3 170mg/L
NaH
2PO
4 12mg/L FeCl
3 4.53mg/L
Na
2EDTA·2H
2O 2.83mg/L CuSO
4 0.01mg/L
ZnSO
4 0.03mg/L CoCl
2 0.02mg/L
MnCl
2 0.23mg/L
Little plan ball algae algae kind and the above-mentioned nutrient solution weight ratio with 1: 10 is inoculated in the pipeline optical collector, and liquid amount is 90%, and inoculation algae kind density is about 1 * 10
5Individual cells/ml, the flue gas in power plant or cement plant is passed through desulfurization, dedusting afterwards via in the speed flow in pipes optical collector 1 of air inlet 13 with 1000 ml/min, for the little algae in the pipeline optical collector 1 provides carbon source, and control system pH is at 7-9, temperature is controlled at 22-30 ℃, and the power-assisted promotion by centrifugal pump 3 is flowed algae liquid in pipeline, via batch mixing and gas swap tank 2, be circulated back to pipeline optical collector 1.
Embodiment 7
Utilize Phaeodactylum tricornutum to process the method for power plant or cement plant flue gas:
The nutrient solution of Phaeodactylum tricornutum is according to the following formulation:
NaCl 25g/L MgSO
4.7H
2O 20mg/L
K
2HPO
4 20mg/L KNO
3 200mg/L
Phaeodactylum tricornutum algae kind and the above-mentioned nutrient solution weight ratio with 1: 15 is inoculated in the pipeline optical collector, and liquid amount is 90%, and inoculation algae kind density is about 7 * 10
4Individual cells/ml, the flue gas in power plant or cement plant is passed through desulfurization, dedusting afterwards via in the speed flow in pipes optical collector 1 of air inlet 13 with 1200 ml/min, for the little algae in the pipeline optical collector 1 provides carbon source, and control system pH is at 7-9, temperature is controlled at 15-22 ℃, and the power-assisted promotion by centrifugal pump 3 is flowed algae liquid in pipeline, via batch mixing and gas swap tank 2, be circulated back to pipeline optical collector 1.
Chemical composition described in above-mentioned little algae nutrient solution prescription is analytically pure commercial goods.
Claims (9)
1. method of utilizing carbon dioxide in little algae absorption from flue gas, it is characterized in that: little algae algae kind that will be in exponential phase is inoculated in the pipeline optical collector, nutrient solution is sent into this system by batch mixing and gas swap tank, under the power-assisted of centrifugal pump promotes, algae liquid flows in pipeline, to through the flue gas of desulfurization, dedusting via in the air inlet flow in pipes optical collector, the carbon dioxide in the flue gas directly be contacted with algae liquid; Algae liquid is again via batch mixing and gas swap tank, be circulated back in the pipeline optical collector, wherein said little algae is very thin Euglena, Phaeodactylum tricornutum, little plan ball algae, chlorella, Chlorococcum, scenedesmus obliquus or haematococcus pluvialis, the cultivating condition of little algae is: with algae kind and nutrient solution with weight ratio 1: 5-1: 15 ratio is injected in the pipeline optical collector, the control dissolved oxygen amount is 10-20mg/L, the pH value is 3.5-10, temperature is 20-35 ℃, electricity is led and is 30-80mS, flow velocity is the 10-25 cel, and system works pressure is at 1 atmospheric pressure.
2. the method for utilizing carbon dioxide in little algae absorption from flue gas according to claim 1, it is characterized in that the desulfurization of described process, dedusting flue gas afterwards via in the speed flow in pipes optical collector of air inlet with 500～1000 ml/min, little algae is a large amount of CO that absorb in system
2The while releasing oxygen, under the effect of centrifugal pump, algae liquid is pushed to batch mixing and gas swap tank, when the dissolved oxygen content that monitors when the dissolved oxygen detector is higher than value range, start vavuum pump, detach gas in the system, reduce dissolved oxygen level, nutrient solution adds mouth from nutrient solution and is added to batch mixing and the gas swap tank.
3. the method for utilizing carbon dioxide in little algae absorption from flue gas according to claim 1 and 2, it is characterized in that described little algae is very thin Euglena, its cultivating condition is: very thin Euglena and nutrient solution are injected in the pipeline optical collector with 1: 10 ratio of weight ratio, the control dissolved oxygen amount is 15-20mg/L, the pH value is 4-6, and temperature is 24-26 ℃, and electricity is led and is 45-60mS, the algae flow velocity is 15 cels, and system works pressure is at 1 atmospheric pressure.
4. equipment with carbon dioxide in little algae absorption from flue gas, it is characterized in that comprising the pipeline optical collector, batch mixing and gas swap tank, centrifugal pump, the first shutoff valve, the second shutoff valve, aerate head, switch valve, vavuum pump, air inlet, wherein, centrifugal pump and the first shutoff valve, the pipeline optical collector is connected in series, between the first shutoff valve and pipeline optical collector, access air inlet, the other end of centrifugal pump is connected with the gas swap tank with batch mixing, batch mixing is connected with the other end of the second shutoff valve and pipeline optical collector with the upper end of gas swap tank, and the inside of batch mixing and gas swap tank is equipped with aerate head.
5. the equipment of carbon dioxide in the little algae absorption from flue gas of a kind of usefulness according to claim 4, it is characterized in that the bottom connection of described pipeline optical collector as the switch valve of the mouth of gathering, be connected with nutrient solution on batch mixing and the gas swap tank and add mouth, gas detection mouth for subsequent use, air release mouth, sample tap, dissolved oxygen detector.
6. the equipment of carbon dioxide according to claim 4 or in the little algae absorption from flue gas of 5 described a kind of usefulness is characterized in that described air inlet is connected with system's entrance point gas analyzer and system's entrance point gas flowmeter; Be connected with system outlet end gas concentration detector and system outlet end gas flowmeter on the air release mouth.
7. the equipment of carbon dioxide according to claim 4 or in the little algae absorption from flue gas of 5 described a kind of usefulness, the caliber that it is characterized in that described pipeline optical collector is 10-30 centimetre, be " U " type or ring-type, and according to the parallel connection of actual treatment amount or the pipeline optical collector more than a group of connecting.
8. the method for carbon dioxide in the little algae absorption from flue gas of online detection of an equipment that utilizes carbon dioxide in the little algae absorption from flue gas of the described usefulness of claim 6, it is characterized in that after flue gas sources is through conventional desulfurization, dust removal process being connected with system entrance point gas analyzer, then by system's entrance point gas flowmeter, flue gas is through system's entrance point gas flowmeter, enter the pipeline optical collector of both culturing microalgae system, the CO of system's air inlet end from air inlet
2Pass into total amount and flow into metering and CO by flue gas
2Concentration calculates, and wherein said system entrance point gas analyzer links to each other with computer with system entrance point gas flowmeter, can detect online CO in the flue gas
2Concentration, and the real-time online record carries out the calculating of instantaneous and integrated flux.
9. the method for carbon dioxide in the little algae absorption from flue gas of online detection according to claim 8, it is characterized in that the connected system port of export gas concentration detector at the air release mouth place at batch mixing and gas swap tank top, the composition of the carbon dioxide and oxygen that this system of on-line monitoring discharges, system outlet end gas concentration detector and system outlet end gas flowmeter series winding, this system of on-line monitoring discharges the flow of gas; System outlet end gas concentration detector, system outlet end gas flowmeter links to each other with computer, after real-time online record and calculating acquisition flue gas pass into this both culturing microalgae system, CO
2The real time data that is absorbed and fixes.
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| CN2009100910129A CN101632898B (en) | 2009-08-20 | 2009-08-20 | Method and equipment for adsorbing CO2 in flue by utilizing microalgae and on-line detection method |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102061261B (en) * | 2010-11-30 | 2013-04-17 | 中国海洋大学 | Method for culturing microalgae by utilizing flue gas of coal fired power plant |
| CN104556545A (en) * | 2013-10-29 | 2015-04-29 | 中国石油化工股份有限公司 | Method for fixing CO2 and treating oil field sewage by using microalgae |
| CN104556548A (en) * | 2013-10-29 | 2015-04-29 | 中国石油化工股份有限公司 | Method for fixing CO2 and treating oil field sewage by using diatom |
| CN103674156B (en) * | 2013-12-30 | 2016-06-22 | 农业部环境保护科研监测所 | A kind of metering method utilizing laboratory micro gas-metering device |
| CN104974931A (en) * | 2015-05-27 | 2015-10-14 | 上海理工大学 | Testing apparatus for CO2 in microalgae organism immobilization combustion flue gas |
| CN105854581B (en) * | 2016-03-23 | 2018-09-25 | 航天凯天环保科技股份有限公司 | A kind of CO2Purifier |
| CN105797572B (en) * | 2016-03-23 | 2018-11-20 | 航天凯天环保科技股份有限公司 | A kind of biological method purification CO2Reaction bed |
| EP3470835B1 (en) * | 2017-10-13 | 2023-03-22 | BoydSense, Inc. | Fluid sensing device for a portable electronic device |
| CN109126361A (en) * | 2018-09-30 | 2019-01-04 | 李永亮 | A kind of flue gas separating system and microalgae culturing device adopting |
| CN111437716B (en) * | 2020-04-03 | 2021-11-26 | 北京航空航天大学 | Microalgae carbon sequestration method based on natural environment regulation |
| CN112391272A (en) * | 2020-10-27 | 2021-02-23 | 北海市绿牌生物科技有限公司 | Microalgae culture system and using method |
| CN115418336B (en) * | 2022-10-19 | 2024-03-22 | 河西学院 | Composite microalgae carbon fixing system and preparation method and application thereof |
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