CN102494848A - Method for monitoring leakage of geological stored carbon dioxide and device thereof - Google Patents

Abstract

The invention discloses a method for monitoring leakage of geological stored carbon dioxide and a device thereof, which directly monitor leakage flux of the carbon dioxide by on-line analyzing the correlation between the oxygen and the carbon dioxide in the atmosphere and on-line deducting the background interference density. The monitoring device mainly includes a data monitoring unit, a data transmitting unit, a data processing unit and a monitor center, and a sample cell for directly monitoring the leakage of the carbon dioxide is designed. The method has the advantages of on-line abnormality identification, direct leakage flux monitoring, wide monitoring range, high monitoring precision and small influence range of temperature and pressure.

Description

A kind of method and device of monitoring the leakage of geology sequestration of carbon dioxide

Technical field

The invention belongs to the carbon dioxide leakage monitoring technical field, relate to a kind of method and device that the geology sequestration of carbon dioxide leaks of monitoring.

Background technology

Along with the influence that the earth " greenhouse effect " produces is more and more stronger, each country all begins to pay close attention to greenhouse gas emission, and carbon dioxide is exactly one of topmost greenhouse gases wherein.In order to reduce CO2 emission, each national researcher and technician have proposed a variety of methods.In recent years, a kind of new technology begins to receive researchers' concern, promptly collecting carbonic anhydride with seal technology (CCS technology) up for safekeeping.This method is at first in the CO2 emission source; Such as power plant; Capture the carbon dioxide of discharging, the carbon dioxide that captures is transported to seals the place up for safekeeping then, such as abendoned oil gas well, discarded colliery, ocean and other places; Utilize the carbon dioxide technology of sealing up for safekeeping that carbon dioxide is sealed up for safekeeping under geological stratification or the ocean deepwater layer with supercriticality, and carry out corresponding seal approach.Behind carbon dioxide generation physics in geological stratification, the chemical reaction, can be fixed in the geological stratification, and, can also promote the regeneration of oil gas or coal-seam gas, improve energy utilization rate in places such as some discarded oil gas wells, collieries.

But, as a new technique in research and development just, the several factors consideration of still needing is arranged, wherein accurate monitoring and the forecast to sequestration of carbon dioxide seepage and leakage is exactly a difficult problem.Because it is bigger that carbon dioxide itself contains higher concentration in the atmosphere carbon dioxide and its change in time, the trace that is leaked in the carbon sequestration project or a spot of carbon dioxide possibly be submerged in the middle of the complicated background concentration that changes, and are difficult to monitor.Up to the present, researchers have proposed a lot of methods, mainly contain the relevant monitoring method (EC method) of vorticity, well logging microearthquake monitoring method, gather methods such as air chamber method, laser radar, tracer agent tracking monitor method, carbon stable isotope monitoring.These methods have advantage separately, but have following its application in the middle of carbon dioxide geological is sealed leakage monitoring up for safekeeping of shortcoming restriction.

1) can't realize the identification of online leakage abnormal signal.Method at present commonly used is before geology is sealed the project implementation up for safekeeping, to obtain mass data to be worth as a setting, after sealing the project implementation up for safekeeping after monitoring a period of time, with seal up for safekeeping before the background value that obtains compare identification.This judgement relatively lags behind, and just need before sealing up for safekeeping, monitor the data in the annual period such as the EC method, sealing enforcement back continuous monitoring one annual data up for safekeeping, then two annual datas is compared, and just can judge whether to leak; Other method is generally so.

2) most of method all can't directly obtain the leakage flux value.Because leakage flux density can directly be reflected in the accumulation degree of the carbon dioxide of the leakage in a certain zone, can estimate actual leakage rate easily through algorithm.But at present except some flux monitoring methods, other monitoring method can only obtain the correlation parameter of judging whether carbon dioxide leakage leaks, does qualitative judgement, can't obtain leakage flux, such as Hyper spectral Imaging, laser radar, well logging micro-seismic method etc.However, present existing flux method, as gather the air chamber method, and belonging to point measurement, can't in the large tracts of land scope, use; Though the EC method can be monitored the flux density in the wide scope, can't realize online abnormal signal identification.

3) most of method belongs to the point measurement method, and monitoring range is little, if the zone of monitor large-area needs a lot of apparatus, cost is too high.In existing method, the EC method can be monitored m ²-km ²Gas flux density in the scope, but directly the monitoring carbon dioxide leakage receives certain limitation;

4) a lot of method apparatus that propose are complicated, expensive, need complicated optical device, well logging micro-seismic method to need geofault scanner etc. such as isotope need of tracking servo mass spectrometer, laser radar, can't popularization and application in Industrial Engineering.

Based on these defectives, research and development can the on-line identification leakage unusually, directly obtain leakage flux, and simple, the lower-cost geology sequestration of carbon dioxide of instrument leakage monitor is very necessary.

Summary of the invention

The problem that the present invention solves is to provide a kind of method and device that the geology sequestration of carbon dioxide leaks of monitoring, and through oxygen, carbon dioxide correlativity in the on-line analysis air, online background correction is disturbed concentration, and direct carbon dioxide leakage flux monitoring is achieved.

The present invention realizes through following technical scheme:

A kind of method of monitoring the leakage of geology sequestration of carbon dioxide may further comprise the steps:

The oxygen carbon of instantaneous flux and carbon dioxide and oxygen of variable quantity and oxygen that concentration of carbon dioxide

through continuous monitoring zone to be measured and concentration of oxygen

are calculated variable quantity

and the concentration of oxygen of concentration of carbon dioxide exchanges than S

With t is the monitoring time step-length, with the monitoring background of the monitoring in the previous time step as the current time step-length, compares S with the oxygen carbon exchange as a setting of the averaged oxygen carbon ratio in the previous time step ₀, likening to the exchange of the averaged oxygen carbon in the step-length before the time is S ₁

Carbon dioxide leakage flux F before current time in the step-length _lObtain through computes:

$F_l=(\frac{1}{S_1}-\frac{1}{S_0})\left({-F}_{O_2}\right)$

Wherein,

is the instantaneous flux of oxygen in the previous time step.

The calculating of the instantaneous flux of described oxygen is the influence of fluctuation, atmospheric temperature and the humidity of Considering Vertical wind speed also, obtains through computes:

$F_{O_2}=\stackrel{\&OverBar;}{w^{\&prime;}{\mathrm{\&rho;}}_{{\mathrm{<figure-callout\; id="2"\; label="O"\; filenames="HDA0000107803490000012.png"\; state="\{\{state\}\}">O</figure-callout>}}_2}^{\&prime;}}+\frac{m_a}{m_v}\frac{\stackrel{\&OverBar;}{{\mathrm{\&rho;}}_{O_2}}\stackrel{\&OverBar;}{w^{\&prime;}{\mathrm{\&rho;}}_v^{\&prime;}}}{\stackrel{\&OverBar;}{{\mathrm{\&rho;}}_a}}+(1+\frac{\stackrel{\&OverBar;}{{\mathrm{\&rho;}}_v}{m}_a}{\stackrel{\&OverBar;}{{\mathrm{\&rho;}}_a}{m}_v})\frac{\stackrel{\&OverBar;}{w^{\&prime;}{T}^{\&prime;}}\stackrel{\&OverBar;}{{\mathrm{\&rho;}}_{O_2}}}{\stackrel{\&OverBar;}{T}}$

Wherein,

Be the instantaneous flux of oxygen, ${\mathrm{\&rho;}}_{{\mathrm{<figure-callout\; id="2"\; label="O"\; filenames="HDA0000107803490000012.png"\; state="\{\{state\}\}">O</figure-callout>}}_2}=2.24\&times;{10}^{-8}\&times;C_{O_2}{M}_{O_2}(\mathrm{Kg}\&CenterDot;m^{-3}),$

Be oxygen concentration,

Be the oxygen molal weight; W ' is the fluctuation of vertical velocity, ρ _a, ρ _vBe respectively the density of dry air and water in air steam; m _aAnd m _vBe respectively the molal weight of dry air and water vapor; T is place, a monitoring point environment temperature.

Described F _lObtain through computes:

$(\frac{1}{S_1}-\frac{1}{S_0})=(\frac{{\mathrm{<figure-callout\; id="2"\; label="dC\; CO"\; filenames="HDA0000107803490000012.png"\; state="\{\{state\}\}">dC</figure-callout>}}_{{\mathrm{CO}}_{}}}{{\mathrm{<figure-callout\; id="2"\; label="dC\; O"\; filenames="HDA0000107803490000012.png"\; state="\{\{state\}\}">dC</figure-callout>}}_{O_{}}}{|}_t-{\frac{{\mathrm{<figure-callout\; id="2"\; label="dC\; CO"\; filenames="HDA0000107803490000012.png"\; state="\{\{state\}\}">dC</figure-callout>}}_{{\mathrm{CO}}_{}}}{{\mathrm{<figure-callout\; id="2"\; label="dC\; O"\; filenames="HDA0000107803490000012.png"\; state="\{\{state\}\}">dC</figure-callout>}}_{O_{}}}|}_{t-1});$

$F_l=(\frac{{\mathrm{<figure-callout\; id="2"\; label="dC\; CO"\; filenames="HDA0000107803490000012.png"\; state="\{\{state\}\}">dC</figure-callout>}}_{{\mathrm{CO}}_{}}}{{\mathrm{dC}}_{O_2}}{|}_t-{\frac{{\mathrm{<figure-callout\; id="2"\; label="dC\; CO"\; filenames="HDA0000107803490000012.png"\; state="\{\{state\}\}">dC</figure-callout>}}_{{\mathrm{CO}}_{}}}{{\mathrm{dC}}_{O_2}}|}_{t-1})\left({-F}_{O_2}\right)$

Wherein t be unit minute, hour or day time step.

A kind of device of monitoring the leakage of geology sequestration of carbon dioxide comprises:

The Data Detection unit comprises that the temperature humidity of three-D ultrasonic anemoscope, detection atmospheric temperature and the humidity of the fluctuation of detection of vertical wind speed is popped one's head in, and the gas sampling probe that detects oxygen, concentration of carbon dioxide;

Data transmission unit, the data that the image data detecting unit is gathered are also transmitted;

Data processing unit; Receive the data of data transmission unit transmission; Calculating carbon dioxide through concentration of carbon dioxide and concentration of oxygen compares with the oxygen carbon exchange of oxygen; Combine the instantaneous flux of data computation oxygen of fluctuation, atmospheric temperature and the humidity of vertical velocity again, calculate the carbon dioxide leakage flux at last;

Monitoring center, the result of calculation of reception data processing unit also shows.

Described three-D ultrasonic anemoscope, temperature humidity probe and gas sampling probe are installed on the monitoring tower, are 1: 50～500 apart from the distance and the monitoring radius ratio on ground.

Described three-D ultrasonic anemoscope, temperature humidity probe and gas sampling probe upwind are installed, and distance each other is no more than 1m, and the three-D ultrasonic anemoscope is installed in the top of temperature humidity probe and gas sampling probe.

Described gas sampling probe comprises the detection air chamber; The head that detects air chamber is connected with airscoop shroud; The center of airscoop shroud is provided with air intake opening, and a side that detects the air chamber afterbody is provided with the gas outlet, detects and is provided with gas concentration lwevel detecting sensor and oxygen biography concentration detection sensor in the air chamber.

Described airscoop shroud is a semisphere, and air intake opening is installed against the wind; Be provided with filter screen between airscoop shroud and the detection air chamber.

Described carbon dioxide sensor comprises infrared carbon dioxide sensor emission end and the infrared carbon dioxide sensor receiving end that symmetry is installed, and oxygen sensor is an electrochemical sensor, is arranged on the gas outlet;

The afterbody that detects air chamber also is provided with the clean-up port.

Described data transmission unit will detect data transmission through wired or wireless mode and give data processing unit.

Compared with prior art, the present invention has following beneficial technical effects:

1) method of monitoring geology sequestration of carbon dioxide leakage provided by the invention; Based on carbon dioxide in the atmosphere and oxygen absorption and discharging rule; Analyze oxygen, carbon dioxide correlativity in the air through continuous on-line, especially the monitoring of carbon dioxide and the oxygen carbon exchange ratio of oxygen; And because oxygen background flux does not change in leakage generation front and back, therefore can monitor online background correction carbon dioxide through oxygen flux to change, direct carbon dioxide leakage flux monitoring is achieved;

2) because line computation be the rate of change of oxygen and gas concentration lwevel or flux, monitoring accuracy is monitored the gas concentration lwevel height more separately; Simultaneously, because utilization is the ratio of gas parameter, so temperature and pressure is less to result's influence, has further improved the precision of monitoring, has reduced the complicacy of monitoring device;

3) can directly obtain the leakage flux of carbon dioxide, further realize confirming of actual leakage rate through algorithm;

4) method provided by the present invention and device can also be applied in the middle of the emission reduction efficiency research of carbon dioxide discharge-reduction project.

Description of drawings

Fig. 1 is aerial oxygen/carbon dioxide absorption of not considering the leakage of geology sequestration of carbon dioxide, the system schematic of discharging;

Fig. 2 is aerial oxygen/carbon dioxide absorption of considering the leakage of geology sequestration of carbon dioxide, the system schematic of discharging;

Fig. 3 connects synoptic diagram for the system of the device that monitoring geology sequestration of carbon dioxide leaks;

Fig. 4 is the structural representation of a kind of concrete realization of Data Detection unit; Wherein, 1 is monitoring tower, and 2 is the three-D ultrasonic anemoscope, and 3 is gas sampling probe, and 4 are the temperature humidity probe, and 5 is power supply;

Fig. 5 is the structural representation of a kind of concrete realization of gas sampling probe.Wherein, 301 for detecting air chamber, and 302 is airscoop shroud, and 303 is air intake opening, and 304 is filter screen, and 305 is infrared carbon dioxide sensor emission end, and 306 is infrared carbon dioxide sensor receiving end, and 307 is oxygen sensor, and 308 is the gas outlet, and 309 is the clean-up port.

Embodiment

Below in conjunction with concrete embodiment and accompanying drawing the present invention is done further detailed description, said is to explanation of the present invention rather than qualification.

Method and device that monitoring geology sequestration of carbon dioxide provided by the invention leaks are based on oxygen and carbon dioxide principle of mobile equilibrium in the ecologic environment.As shown in Figure 1, when not considering that the geology sequestration of carbon dioxide leaks, the carbon dioxide in terrestrial ecosystems and the absorption of oxygen and emission source mainly are made up of the metabolism of biosystem, these two parts of burning of fossil fuel.Wherein the assimilation of biosystem consumes carbon dioxide and produces oxygen, dissimilation oxygen consumed and produce carbon dioxide.These two processes interact and make that oxygen (exchanges ratio ,-Δ O hereinafter to be referred as oxygen carbon with the carbon dioxide exchange ratio in whole biosystem metabolic processes ₂/ Δ CO ₂) keeping mobile equilibrium, its value is about 1.1.The combustion process of fossil fuel is understood oxygen consumed and is produced carbon dioxide, oxygen and carbon dioxide content in this process decision atmosphere.Wherein the ratio of consume oxygen and generation carbon dioxide is decided by the component and the burning degree of fossil fuel.This combustion process is irreversible, thereby on long terms, the carbon dioxide in the environment can increase, and oxygen can reduce.But in short time interval, fuel element and atmospheric environment can remain unchanged, so the oxygen carbon exchange rate of combustion process is metastable.Can obtain following formula 1 and 2.

${\mathrm{<figure-callout\; id="2"\; label="F\; CO"\; filenames="HDA0000107803490000012.png"\; state="\{\{state\}\}">F</figure-callout>}}_{{\mathrm{CO}}_{}}=F_f-F_b---\left(1\right)$

$F_{O_2}=-R_f{F}_f+R_b{F}_b---\left(2\right)$

Wherein With

Be CO total in the Atmospheric models ₂And O ₂Flux; F _fAnd F _b(molm ^-2S ^-1) be respectively the carbon dioxide flux in combustion of fossil fuel process and bio-metabolic process; R _fAnd R _bBe O in these two processes ₂And CO ₂Exchange rate.

If said system near geology is sealed project up for safekeeping, is then considered carbon dioxide leakage, and is as shown in Figure 2, then the emission of carbon-dioxide source has increased a carbon dioxide leakage source.Simultaneously, formula 1 will change and be formula 3:

${\mathrm{<figure-callout\; id="2"\; label="F\; CO"\; filenames="HDA0000107803490000012.png"\; state="\{\{state\}\}">F</figure-callout>}}_{{\mathrm{CO}}_{}}=F_f-F_b+F_1---\left(3\right)$

This formula the right has increased carbon dioxide leakage flux F ₁This; Since formula 3 the right preceding two all relevant and be linear dependence with oxygen; And the 3rd leakage item is irrelevant with oxygen; Take place if therefore leak, leak item and will change correlationship originally stable between oxygen and the carbon dioxide, further destroy its correlativity or form new correlationship.

According to above three formulas, finally obtain computing formula about leakage rate:

$F_l=(\frac{1}{S_1}-\frac{1}{S_0})\left({-F}_{O_2}\right)---\left(4\right)$

Wherein, F _l(apparent leakage flux, ALF), its unit is molm to be called apparent leakage rate ^-2S ^-1, carbon dioxide leakage amount, i.e. carbon dioxide leakage flux in the representation unit square measure time; S0 is called background oxygen carbon exchange ratio, S ₁Be current oxygen carbon exchange ratio.

This formula comprises two parts: the variation of oxygen carbon exchange ratio before and after first

representative is leaked; In the ideal case; If do not leak, this value equals 0; After leaking, this value will increase; Second portion

is represented the trend of carbon dioxide in the background, and it becomes negative correlation with oxygen.Because oxygen flux before and after leaking generation does not change, therefore can monitor online background correction carbon dioxide and change through oxygen flux.

When specifically monitoring; The variation of first oxygen carbon exchange ratio, the oxygen carbon of instantaneous flux and carbon dioxide and oxygen of variable quantity

and oxygen that calculates variable quantity

and the concentration of oxygen of concentration of carbon dioxide through the concentration of carbon dioxide

and the concentration of oxygen

in continuous monitoring zone to be measured exchanges than S:

$S={\mathrm{\&Delta;<figure-callout\; id="2"\; label="C\; O"\; filenames="HDA0000107803490000012.png"\; state="\{\{state\}\}">C</figure-callout>}}_{O_{}}/{\mathrm{\&Delta;C}}_{{\mathrm{CO}}_2}---\left(5\right)$

When continuous monitoring, be the monitoring time step-length with t, time step can be a step interval with unit minute, hour, day as required.With the monitoring background of the monitoring in the previous time step, S is compared in the oxygen carbon exchange as a setting of the averaged oxygen carbon ratio in the previous time step as the current time step-length ₀, likening to the exchange of the averaged oxygen carbon in the current time step-length is S ₁Utilize interior oxygen of the adjacent time step of online least square regression (LSR) algorithm computation and carbon dioxide linear regression model (LRM) scale-up factor to obtain S ₀And S ₁Thereby, obtain with following formula:

$(\frac{1}{S_1}-\frac{1}{S_0})=(\frac{{\mathrm{<figure-callout\; id="2"\; label="dC\; CO"\; filenames="HDA0000107803490000012.png"\; state="\{\{state\}\}">dC</figure-callout>}}_{{\mathrm{CO}}_{}}}{{\mathrm{<figure-callout\; id="2"\; label="dC\; O"\; filenames="HDA0000107803490000012.png"\; state="\{\{state\}\}">dC</figure-callout>}}_{O_{}}}{|}_t-{\frac{{\mathrm{<figure-callout\; id="2"\; label="dC\; CO"\; filenames="HDA0000107803490000012.png"\; state="\{\{state\}\}">dC</figure-callout>}}_{{\mathrm{CO}}_{}}}{{\mathrm{<figure-callout\; id="2"\; label="dC\; O"\; filenames="HDA0000107803490000012.png"\; state="\{\{state\}\}">dC</figure-callout>}}_{O_{}}}|}_{t-1})---\left(6\right)$

(4) formula just can be transformed to so:

$F_l=(\frac{{\mathrm{<figure-callout\; id="2"\; label="dC\; CO"\; filenames="HDA0000107803490000012.png"\; state="\{\{state\}\}">dC</figure-callout>}}_{{\mathrm{CO}}_{}}}{{\mathrm{<figure-callout\; id="2"\; label="dC\; O"\; filenames="HDA0000107803490000012.png"\; state="\{\{state\}\}">dC</figure-callout>}}_{O_{}}}{|}_t-{\frac{{\mathrm{<figure-callout\; id="2"\; label="dC\; CO"\; filenames="HDA0000107803490000012.png"\; state="\{\{state\}\}">dC</figure-callout>}}_{{\mathrm{CO}}_{}}}{{\mathrm{<figure-callout\; id="2"\; label="dC\; O"\; filenames="HDA0000107803490000012.png"\; state="\{\{state\}\}">dC</figure-callout>}}_{O_{}}}|}_{t-1})\left({-F}_{O_2}\right)---\left(7\right)$

Second portion

mainly is that the detection through oxygen flux realizes; Calculate with the instantaneous flux of the oxygen in the previous time step, thereby obtain the carbon dioxide leakage flux in the current time step-length.

And when specifically carrying out the detection of gas flux, this method is utilized vorticity relative theory monitoring gas flux, can realize the flux density in the wide scope, and its monitoring range can reach m ²-km ², and adjust coordinates computed in real time, make coordinates computed consistent with wind direction, the vertical velocity fluctuation that finally obtains is irrelevant with horizontal wind speed, thus not wind-engaging to variable effect.Its ultimate principle is on average regular according to Reynolds; The turbulent fluid that air is such is defined as a mean state amount and departs from average undulate quantity x ' sum at any the mobile of moment; Promptly

can separate with undulate quantity average magnitude from entire amount; Mainly study the fluctuation situation of measurand then, its basic calculating formula is:

$F=\stackrel{\&OverBar;}{w^{\&prime;}{c}^{\&prime;}}---\left(8\right)$

F is gas flux density (molm ^-2S ^-1), w ' is the fluctuation (ms of vertical velocity ^-1), c ' is gas concentration fluctuation (molm ^-3);

Temperature humidity probe is used for the atmospheric sounding temperature and humidity, and to revise the influence of temperature and humidity to final gas flux value, calculating gas flux correction formula commonly used is:

${\mathrm{<figure-callout\; id="2"\; label="F\; O"\; filenames="HDA0000107803490000012.png"\; state="\{\{state\}\}">F</figure-callout>}}_{O_{}}=\stackrel{\&OverBar;}{w^{\&prime;}{\mathrm{\&rho;}}_{{\mathrm{<figure-callout\; id="2"\; label="O"\; filenames="HDA0000107803490000012.png"\; state="\{\{state\}\}">O</figure-callout>}}_2}^{\&prime;}}+\frac{m_a}{m_v}\frac{\stackrel{\&OverBar;}{{\mathrm{\&rho;}}_{{\mathrm{<figure-callout\; id="2"\; label="O"\; filenames="HDA0000107803490000012.png"\; state="\{\{state\}\}">O</figure-callout>}}_2}}\stackrel{\&OverBar;}{w^{\&prime;}{\mathrm{\&rho;}}_v^{\&prime;}}}{\stackrel{\&OverBar;}{{\mathrm{\&rho;}}_a}}+(1+\frac{\stackrel{\&OverBar;}{{\mathrm{\&rho;}}_v}{m}_a}{\stackrel{\&OverBar;}{{\mathrm{\&rho;}}_a}{m}_v})\frac{\stackrel{\&OverBar;}{w^{\&prime;}{T}^{\&prime;}}\stackrel{\&OverBar;}{{\mathrm{\&rho;}}_{{\mathrm{<figure-callout\; id="2"\; label="O"\; filenames="HDA0000107803490000012.png"\; state="\{\{state\}\}">O</figure-callout>}}_2}}}{\stackrel{\&OverBar;}{T}}---\left(9\right)$

Wherein, ${\mathrm{\&rho;}}_{{\mathrm{<figure-callout\; id="2"\; label="O"\; filenames="HDA0000107803490000012.png"\; state="\{\{state\}\}">O</figure-callout>}}_2}=2.24\&times;{10}^{-8}\&times;C_{O_2}{M}_{O_2}(\mathrm{Kg}\&CenterDot;m^{-3}),$

Be oxygen concentration (ppm); Be oxygen molal weight (gmol ^-1);

Be the instantaneous flux (molm of oxygen ²S ^-1); W ' is the fluctuation (ms of vertical velocity ^-1); ρ _a, ρ _vBe respectively the density (kgm of dry air and water in air steam ^-3), change by its reflection atmospheric humidity; m _aAnd m _vBe respectively the molal weight (gmol of dry air and water vapor ^-1); T is place, a monitoring point environment temperature (K).

Based on said method, referring to Fig. 3, a kind of device that the geology sequestration of carbon dioxide leaks of monitoring is provided, comprising:

The Data Detection unit comprises that the temperature humidity of three-D ultrasonic anemoscope, detection atmospheric temperature and the humidity of the fluctuation of detection of vertical wind speed is popped one's head in, and the gas sampling probe that detects oxygen, concentration of carbon dioxide;

Data transmission unit, the data that the image data detecting unit is gathered are also transmitted;

Data processing unit; Receive the data of data transmission unit transmission; Calculating carbon dioxide through concentration of carbon dioxide and concentration of oxygen compares with the oxygen carbon exchange of oxygen; Combine the instantaneous flux of data computation oxygen of fluctuation, atmospheric temperature and the humidity of vertical velocity again, calculate the carbon dioxide leakage flux at last;

Monitoring center, the result of calculation of reception data processing unit also shows.Surpass certain level if apparent leakage amount abnormity increases, show to have to leak and take place.

Referring to Fig. 4, being embodied as of concrete Data Detection unit: three-D ultrasonic anemoscope 1, temperature humidity probe 3 and gas sampling probe 4 are installed on the monitoring tower 1, and power supply 5 provides power supply;

Three-D ultrasonic anemoscope, temperature humidity probe and gas sampling probe upwind are installed; The three-D ultrasonic anemoscope will be a little more than sampling probe and humiture probe setting height(from bottom); The three should be as far as possible near (distance each other the is no more than 1m) consistance to guarantee to take a sample; Distance apart from ground depends on monitoring range and topographic features, and general is 1: 50～500 with monitoring radius ratio; The sampling probe air intake opening is towards the anemoscope position.

Referring to Fig. 5; Gas sampling probe comprises detection air chamber 301; The head that detects air chamber 301 is connected with airscoop shroud 302; The center of airscoop shroud 302 is provided with air intake opening 303, and a side that detects air chamber 301 afterbodys is provided with gas outlet 308, detects and is provided with gas concentration lwevel detecting sensor and oxygen biography concentration detection sensor 307 in the air chamber 301; Carbon dioxide sensor comprises the infrared carbon dioxide sensor emission end 305 and infrared carbon dioxide sensor receiving end 306 that symmetry is installed; Oxygen sensor is an electrochemical sensor; Be arranged on the gas outlet 308, the afterbody that detects air chamber 301 also is provided with clean-up port 309.

And airscoop shroud 302 is designed to semisphere, air intake opening is installed against the wind; 301 are provided with filter screen 304 between airscoop shroud 302 and the detection air chamber.

Air intake opening is installed against the wind during installation, and anemoscope rotates and also helps air inlet.Airscoop shroud is designed to the hemisphere model, avoids gas to form obvious eddy current at air intake opening, and influence is measured.Filter screen is installed to prevent that solid sundries influences monitoring result in the air between airscoop shroud and sensing chamber.The gas outlet is arranged on sensor one side, and its structural design makes gas flow help sensor and contacts with tested gas.In the bottom cleaning eye that can open and seal is set, so that probe is cleared up.

Described data transmission unit will detect data transmission through wired or wireless mode and give data processing unit.Data transmit can adopt wired transmission, such as RS485; Also can adopt wireless transmissioning mode, this load mode need be provided with special wireless base station apparatus at the scene, at data receiver the wireless reception device is set, and the data that receive re-send to data processing unit and handle.

Claims (10)

1. monitor the method that the geology sequestration of carbon dioxide leaks for one kind, it is characterized in that, may further comprise the steps:

The oxygen carbon of instantaneous flux and carbon dioxide and oxygen of variable quantity and oxygen that concentration of carbon dioxide

through continuous monitoring zone to be measured and concentration of oxygen

are calculated variable quantity

and the concentration of oxygen of concentration of carbon dioxide exchanges than S

With t is the monitoring time step-length, with the monitoring background of the monitoring in the previous time step as the current time step-length, S is compared in the oxygen carbon exchange as a setting of the averaged oxygen carbon ratio in the previous time step ₀, likening to the exchange of the averaged oxygen carbon in the current time step-length is S ₁

Carbon dioxide leakage flux F before current time in the step-length _lObtain through computes:

$F_l=(\frac{1}{S_1}-\frac{1}{S_0})\left({-F}_{O_2}\right)$

Wherein,

is the instantaneous flux of oxygen in the previous time step.

2. the method that monitoring geology sequestration of carbon dioxide as claimed in claim 1 leaks is characterized in that the calculating of the instantaneous flux of described oxygen is the influence of fluctuation, atmospheric temperature and the humidity of Considering Vertical wind speed also, obtains through computes:

$F_{O_2}=\stackrel{\&OverBar;}{w^{\&prime;}{\mathrm{\&rho;}}_{O_2}^{\&prime;}}+\frac{m_a}{m_v}\frac{\stackrel{\&OverBar;}{{\mathrm{\&rho;}}_{O_2}}\stackrel{\&OverBar;}{w^{\&prime;}{\mathrm{\&rho;}}_v^{\&prime;}}}{\stackrel{\&OverBar;}{{\mathrm{\&rho;}}_a}}+(1+\frac{\stackrel{\&OverBar;}{{\mathrm{\&rho;}}_v}{m}_a}{\stackrel{\&OverBar;}{{\mathrm{\&rho;}}_a}{m}_v})\frac{\stackrel{\&OverBar;}{w^{\&prime;}{T}^{\&prime;}}\stackrel{\&OverBar;}{{\mathrm{\&rho;}}_{O_2}}}{\stackrel{\&OverBar;}{T}}$

Wherein,

Be the instantaneous flux of oxygen, ${\mathrm{\&rho;}}_{O_2}=2.24\&times;{10}^{-8}\&times;C_{O_2}{M}_{O_2}(\mathrm{Kg}\&CenterDot;m^{-3}),$

Be oxygen concentration,

Be the oxygen molal weight; W ' is the fluctuation of vertical velocity, ρ _a, ρ _vBe respectively the density of dry air and water in air steam; m _aAnd m _vBe respectively the molal weight of dry air and water vapor; T is place, a monitoring point environment temperature.

3. the method that monitoring geology sequestration of carbon dioxide as claimed in claim 1 leaks is characterized in that described F _lObtain through computes:

$(\frac{1}{S_1}-\frac{1}{S_0})=(\frac{{\mathrm{dC}}_{{\mathrm{CO}}_2}}{{\mathrm{dC}}_{O_2}}{|}_t-{\frac{{\mathrm{dC}}_{{\mathrm{CO}}_2}}{{\mathrm{dC}}_{O_2}}|}_{t-1});$

$F_l=(\frac{{\mathrm{dC}}_{{\mathrm{CO}}_2}}{{\mathrm{dC}}_{O_2}}{|}_t-{\frac{{\mathrm{dC}}_{{\mathrm{CO}}_2}}{{\mathrm{dC}}_{O_2}}|}_{t-1})\left({-F}_{O_2}\right);$

Wherein t is a unit minute step-length.

4. monitor the device that the geology sequestration of carbon dioxide leaks for one kind, it is characterized in that, comprising:

The Data Detection unit comprises that the temperature humidity of three-D ultrasonic anemoscope, detection atmospheric temperature and the humidity of the fluctuation of detection of vertical wind speed is popped one's head in, and the gas sampling probe that detects oxygen, concentration of carbon dioxide;

Data transmission unit, the data that the image data detecting unit is gathered are also transmitted;

Data processing unit; Receive the data of data transmission unit transmission; Calculating carbon dioxide through concentration of carbon dioxide and concentration of oxygen compares with the oxygen carbon exchange of oxygen; Combine the instantaneous flux of data computation oxygen of fluctuation, atmospheric temperature and the humidity of vertical velocity again, calculate the carbon dioxide leakage flux at last;

Monitoring center, the result of calculation of reception data processing unit also shows.

5. the device that monitoring geology sequestration of carbon dioxide as claimed in claim 4 leaks; It is characterized in that; Described three-D ultrasonic anemoscope, temperature humidity probe and gas sampling probe are installed on the monitoring tower, are 1: 50～500 apart from the distance and the monitoring radius ratio on ground.

6. the device that monitoring geology sequestration of carbon dioxide as claimed in claim 4 leaks; It is characterized in that; Described three-D ultrasonic anemoscope, temperature humidity probe and gas sampling probe upwind are installed; Distance each other is no more than 1m, and the three-D ultrasonic anemoscope is installed in the top of temperature humidity probe and gas sampling probe.

7. the device that monitoring geology sequestration of carbon dioxide as claimed in claim 4 leaks; It is characterized in that; Described gas sampling probe comprises the detection air chamber, and the head that detects air chamber is connected with airscoop shroud, and the center of airscoop shroud is provided with air intake opening; A side that detects the air chamber afterbody is provided with the gas outlet, detects and is provided with gas concentration lwevel detecting sensor and oxygen biography concentration detection sensor in the air chamber.

8. the device that monitoring geology sequestration of carbon dioxide as claimed in claim 7 leaks is characterized in that described airscoop shroud is a semisphere, and air intake opening is installed against the wind; Be provided with filter screen between airscoop shroud and the detection air chamber.

9. the device that monitoring geology sequestration of carbon dioxide as claimed in claim 7 leaks; It is characterized in that; Described carbon dioxide sensor comprises infrared carbon dioxide sensor emission end and the infrared carbon dioxide sensor receiving end that symmetry is installed; Oxygen sensor is an electrochemical sensor, is arranged on the gas outlet;

The afterbody that detects air chamber also is provided with the clean-up port.

10. the device that monitoring geology sequestration of carbon dioxide as claimed in claim 4 leaks is characterized in that, described data transmission unit will detect data transmission through wired or wireless mode and give data processing unit.

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