JP2004309143A - Gas monitoring apparatus and gas monitoring method in underground fixation of carbon dioxide, and underground fixing method of carbon dioxide - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a leaked gas monitoring apparatus for simultaneously determining the concentration of a plurality of constituent gases (1), for relatively easily distinguishing a gas constituent that may be present (2), for achieving unattended operation (3), for achieving maintenance-free operation without requiring any utilities other than electricity (4), and for nearly simultaneously measuring the analysis of a plurality of relatively far measurement points. <P>SOLUTION: A laser generating apparatus 100 and a Raman probe 5, and further the Raman probe 5 and a Raman scattered light analyzing apparatus 300 are connected by an optical fiber means 200. The Raman probe 5 receives laser beams dispatched from the laser generating apparatus 100 via the optical fiber means 200. An underground or ground gas to be measured from the Raman probe is irradiated with laser beams, and the generated Raman scattered light is inputted to the optical fiber means 200 for transmitting to the Raman scattered light analyzing apparatus 300. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for immobilizing carbon dioxide gas by introducing carbon dioxide gas into the ground and fixing the carbon dioxide gas while monitoring the gas in the ground or gas leaking to the surface of the ground and monitoring the gas. .
[0002]
[Prior art]
In recent years, as environmental pollution has progressed on a global scale, global warming has become a problem due to a greenhouse effect due to accumulation of carbon dioxide gas emitted by the use of fossil fuels in the atmosphere. Therefore, the emission of carbon dioxide is being regulated on a global scale, and technologies for suppressing carbon dioxide generation, such as energy saving technology, conversion to fuel with a low carbon content, and a combustion method for reducing the generation of carbon dioxide, have been proposed. On the other hand, a technique of separating and removing carbon dioxide in combustion gas discharged in large quantities from power plants and the like and fixing the separated and recovered carbon dioxide has been gradually developed. Among such immobilization technologies, a technology for introducing and immobilizing carbon dioxide gas into a coal seam, an oil field, a natural gas field, and the like has been studied and proposed.
[0003]
Patent Literature 1 proposes a method of immobilizing carbon dioxide in the ground isolated from an ecosystem. That is, in this document, in the underground methane hydrate layer, carbon dioxide gas is introduced to replace carbon dioxide gas and methane, and the carbon dioxide gas is fixed to the hydrate layer as a carbon dioxide hydrate layer, and natural gas A method for fixing carbon dioxide to the ground is described.
[0004]
Patent Document 2 relates to a method and an apparatus for detecting gas leakage, including an apparatus for generating intensity-modulated fundamental wave and Raman wave laser light, and a measuring cell through which the fundamental wave and Raman light from the generator are transmitted. In the gas leak detection device that measures the sound waves generated in the measurement cell, the same gas as the gas to be detected is excluded between the generation device of the fundamental laser light and the measurement cell, excluding the generation device of the Raman wave laser light. The arrangement of the enclosed cells is described.
[0005]
Examples of applying Raman scattered light gas to gas analysis include Patent Literature 3 and Patent Literature 4, but these are applied to exhaled gas.
[0006]
[Patent Document 1]
JP-A-6-71161
[Patent Document 2]
JP-A-9-101230
[Patent Document 3]
JP-A-8-219995
[Patent Document 4]
JP-A-6-242002
[0007]
[Problems to be solved by the invention]
Carbon dioxide fixation technology is a technology to fix carbon dioxide by replacing carbon dioxide with methane gas contained in coal and replacing carbon dioxide with oil and natural gas in oil and natural gas fields. The carbon dioxide gas is fixed in the through hole. However, since the actual stratum has a myriad of cracks such as faults and a porous stratum such as a gravel layer, carbon dioxide gas is also expected to leak to the surface. For this reason, it is necessary to monitor the gas in the ground and near the surface of the ground during and after the introduction of carbon dioxide gas, and to manage that it is appropriately fixed. When carbon dioxide is introduced into coal, oil, or natural gas fields, a method of injecting high-pressure carbon dioxide from a borehole or the like is generally employed. Methane gas, oil, etc., which are extruded by this press-fitting, are withdrawn from the same boring port or another boring port, the internal pressure is reduced, and the extracted gas or petroleum is used as resources. Part of the immobilized carbon dioxide gas is thought to move through the gravel layer and fault due to changes in internal pressure and concentration diffusion, and if there is a groundwater layer, it will dissolve and move in the groundwater. Leakage gas resulting from the fixation of carbon dioxide gas is accompanied by gas components (such as hydrocarbon gas mainly containing methane, hydrogen sulfide, and ammonia) contained in coal, oil, and natural gas, in addition to carbon dioxide gas. Rather, when trying to detect the initial stage of leakage, it is considered that these gas components are more than carbon dioxide gas. In addition to these, air components may be mixed near the ground surface. Furthermore, when the groundwater layer is close, water vapor is considered to be included.
As a means for measuring these leaked gases, a gas chromatographic analysis method, an infrared absorption method and the like are generally used.
[0008]
The gas chromatograph method enables identification and quantification of gas components by introducing a small amount of sample gas into a gas chromatograph. However, operating a gas chromatograph requires a carrier gas, and as a long-term monitoring device, there is a problem in that there is a problem in maintenance and management of the device such as replenishment of the carrier gas.
[0009]
The infrared absorption method is an analysis method capable of qualitatively and quantitatively measuring carbon dioxide gas, methane gas, and the like. The qualitative analysis can be performed by performing the spectrum analysis, but the gas spectrum analysis has a problem in the quantitativeness. When quantifying each component gas using the infrared absorption method, it is necessary to prepare a separate sample cell for each component in order to select an infrared wavelength region by a filter. Also, O₂, N₂, H₂However, there is a drawback in that a diatomic molecule such as the above cannot be measured, and thus requires another analysis means.
[0010]
Mass spectrometry can provide extremely accurate and sensitive gas concentration measurements.
Mass spectrometers are expensive and complex instruments that require frequent calibration and maintenance. Moreover, it is necessary to use a delicate vacuum gauge and an ion source. Therefore, it can be said that there is a problem in terms of maintenance as an unattended long-term monitoring device.
[0011]
In the case of monitoring leak gas in carbon dioxide fixation, long-term monitoring is required, and unmanned operation and maintenance-free operation are required. The measurement points are relatively far from the carbon dioxide gas inlet, and it is necessary to monitor by providing one or more measurement points. In this case, piping from each measurement point to the analyzer results in an enormous length, and as the distance increases, the fluid resistance increases and the time to reach the analyzer increases.
[0012]
Raman analysis was reported in 1928 by C.W. V. Since the Raman effect was discovered by Raman, the measurement of the Raman spectrum was first performed by a photographic method using a mercury lamp as a light source, but a laser was discovered in the 1960s, and a highly sensitive photomultiplier tube and charge-coupled Devices have become available and have evolved rapidly. The laser Raman analysis method can be applied to solids, liquids, and gases, but the gas has low density and low Raman scattering intensity because of its low density.
[0013]
The present invention relates to a gas monitoring device for underground carbon dioxide fixation that is effective for monitoring (monitoring) gas in the ground and near the ground surface during and after the introduction of carbon dioxide gas and managing that the gas is properly fixed. And a method. Here, "effective for managing proper fixation" means that gas components can be easily fixed and / or quantified and long-term monitoring can be performed at low cost. Say
[0014]
More specifically, the objects of the present invention are (1) the concentration of a plurality of component gases can be determined simultaneously, and (2) the gas components that may be present can be distinguished relatively easily. (3) a leak gas monitoring device that can be operated unattended, (4) is maintenance-free without the need for utilities other than electricity, and (5) can measure the analysis of a plurality of relatively remote measurement points almost simultaneously. provide.
Another object of the present invention is to provide a method for appropriately immobilizing carbon dioxide while monitoring gas continuously for a long period of time.
[0015]
[Means for Solving the Problems]
In the present invention, in order to achieve the above object, underground gas or gas leaking to the ground surface is monitored using Raman light scattering.
Scattering of light due to the Raman effect was described in 1928 by C.W. V. First presented by Raman. When a substance is irradiated with monochromatic light (frequency νo) such as laser light, the scattered light from the substance is light having the same frequency νo (Rayleigh scattered light) as the irradiation light and an extremely light having a frequency νo ± νi. Weak light (Raman scattered light) is observed. Therefore, chemical composition and concentration can be measured by measuring Raman scattered light. Gases, unlike solids and liquids, give very sharp Raman bands due to their small interaction with surrounding molecules. The peak position of the Raman band is unique to each gas, and the gas component can be identified from the band position.
[0016]
In coal, oil, and natural gas fields, it is known that gas components leak to the ground surface through cracks such as faults. It is known that these gases are mainly composed of methane gas due to volatility. However, relatively volatile gases found in coal, oil and natural gas are also included as impurities.
[0017]
It is thought that there is almost no air component such as oxygen and nitrogen in a deep underground place, but it may be included in a shallow place. Where there is groundwater including hot spring water, it is considered that water and volatile components in the groundwater are contained.
If carbon dioxide is injected into coal, oil, or natural gas and there is a leak, it is considered that carbon dioxide will be mixed into these gases. Therefore, it is possible to measure the underground gas and the carbon dioxide gas without interference spectroscopically.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a configuration diagram showing one embodiment of the present invention. The laser beam generated by the laser device 1 is introduced from the laser coupling optical system 3 constituting the laser generator 100 to the Raman probe 5 via the optical fiber 4 (first optical fiber) as the optical fiber means 200. The Raman probe 5 and a part of the optical fiber 4A are arranged inside the hollow tube 15. As described above, when carbon dioxide is introduced into coal, oil, or natural gas fields, a method is generally adopted in which high-pressure carbon dioxide is injected from a hollow tube through a borehole. Although the Raman probe 5 can be installed in the middle of the hollow tube, it is preferable to provide the Raman probe inside the other hollow tube 15 provided with the boring port 16. In this case, the boring port 16 may be set at a depth of several meters underground. The inside of the hollow tube 15 is filled with methane gas or the like, and the influence of carbon dioxide gas in the atmosphere is eliminated. As described above, measuring deep underground so as not to be affected by carbon dioxide in the atmosphere is one feature, and is an important factor.
[0019]
The Raman probe 5 has a bandpass filter 502 and a dichroic filter 503, and converts the input laser light into monochromatic light. The laser light is focused on the measurement point 19 by the objective lens 501. The scattered light is received by the objective lens 501, and only the Raman scattered light (Raman light) is reflected by the dichroic filter 503 to be separated from the laser light path 17. Thus, the optical path 18 of the Raman scattered light is formed. The long pass filter 505 further converts only the Raman light into the return optical fiber 4A (second optical fiber) which is the optical fiber means 200. The Raman light returned by the optical fiber 4A is further removed from the Rayleigh light by the Raman notch filter 7, and sent to the spectroscope 8. The Raman light separated by the spectroscope 8 is detected by a photodetector 9 such as a CCD or a photomultiplier which is a Raman scattered light analyzer 300, and a Raman spectrum is obtained. The Raman scattered light analyzer 300 includes a photodetector controller 10 and a computer 11. The computer 11 has not only a function as a control device for controlling the photodetector controller 10 and the power supply 2 for laser, but also a screen display function. That is, it has a function as an image processing device and an image display device that display the analyzed Raman scattered light on a screen. Since the detected Raman scattered light has a low signal intensity, it is preferable to use an optical fiber.
As described above, the gas monitoring device includes the first filter device that filters the laser light at the outlet of the first optical fiber, and the second filter device that removes the background including the Raman light generated by the first optical fiber and filters the laser light. Is provided.
[0020]
The gas monitoring device includes a first filter device that filters laser light at a first optical fiber outlet, and a background that includes Raman light generated by the first optical fiber is removed, the laser light is filtered, and scattered light from the gas to be measured is removed. A second filter device that separates Raman light from the light, a third filter device that removes Rayleigh light contained in the separated Raman light, and a fourth filter device that further removes Rayleigh light precisely.
[0021]
The gas monitoring device includes a band filter or a band pass filter as a first filter, a dichroic filter or a dichroic beam splitter as a second filter, a long pass filter as a third filter, and a notch filter or a fourth filter. A laser blocking filter is provided.
[0022]
For gas monitoring, a charge coupled device (CCD) can be used as a photodetector.
The gas monitoring device may use a photomultiplier tube (PMT) as a photodetector.
[0023]
The gas monitoring includes a Raman measurement probe coupled to a laser, and means for irradiating a laser beam to the gas to be measured through the Raman measurement probe.
The gas monitoring device includes a Raman measurement probe that collects Raman scattered light from the gas to be measured.
[0024]
The gas monitoring device can use the first optical fiber between the laser light source and the probe, and can use the second optical fiber between the probe and the Raman spectrometer.
[0025]
FIG. 2 shows a Raman spectrum of a mixed gas of methane gas and carbon dioxide gas. Carbon dioxide gas is 1388 [cm^{− 1}] And 1286 [cm^-1] Are known to appear in two places. On the other hand, methane is 2917 [cm^-1], 1534 [cm^-1], 3019 [cm^-1], 1306 [cm^-1] Are known. It is a peak group shown in FIG. 2 that may interfere with the Raman shift peaks. 1388 [cm] of carbon dioxide^-1] And 1534 [cm^-1] Are sufficiently separated from each other peak and can be measured without receiving mutual interference.
[0026]
The monitoring gas is mainly composed of methane, but the gas generated from buried hydrocarbon compounds such as coal contains hydrogen sulfide, ammonia, and impurity gases such as water (gas and liquid). FIG. 3 shows a Raman spectrum when these impurity gases are mixed. 1388 [cm] of carbon dioxide^-1] Can be measured without interference of the impurity gas peak.
[0027]
The Raman probe can be reduced in size (10 mmφ) and can be measured away from the main body of the analyzer by an optical fiber, so that it can be inserted into a borehole and measured. For this reason, it is possible to prevent the outside air from entering the ground surface. An accurate leak of carbon dioxide can be detected.
Further, in the leak gas monitoring device of the present invention, the utility of the measuring device is only electricity, and a computer that controls the measuring device manages the measuring device, so that long-term unmanned operation is possible.
[0028]
In the method of immobilizing carbon dioxide gas by introducing carbon dioxide gas into the ground, a gas monitoring device and a monitoring method for analyzing gas in the ground or gas leaked to the surface by Raman light scattering are configured. In order to detect the gas leaked to the surface of the ground, it is necessary to devise measures such as providing a cover so as not to be affected by the carbon dioxide gas in the atmosphere similarly to the hollow tube 15.
[0029]
In the gas monitoring device, means for irradiating the gas to be measured with a laser light source having a wavelength such that Raman scattered light is generated from the irradiated gas, means for collecting Raman scattered light from the gas to be measured, and collection from the gas to be measured A gas monitoring device and a monitoring method including means for detecting the obtained Raman scattered light are configured.
The gas monitoring device may include determining the concentration of the component gas contained in the gas to be measured.
The gas monitoring device can generate a spectrum from the detected light and analyze the spectrum.
[0030]
As described above, in the gas monitoring device for analyzing the gas in the ground when the carbon dioxide gas is introduced into the ground to fix the carbon dioxide gas, the laser monitoring device 100 and the hollow tube buried in the ground are disposed. A Raman probe 5 and a Raman scattered light analyzer 300, and a laser generator and a Raman probe 5, and a Raman probe 5 and a Raman scattered light analyzer 300 are provided in a hollow tube 15. The measurement signal is transmitted to the Raman scattered light analyzer 300 via the first optical fiber 4 and the second optical fiber 4A, and the Raman probe 5 receives the laser transmitted from the laser generator 100 via the first optical fiber 4, and A second optical fiber 4 for irradiating the gas to be measured with a laser beam from the probe 5 and transmitting the generated Raman scattered light to the Raman scattered light analyzer 300 Gas monitoring apparatus is constructed in the sequestration of carbon dioxide gas to be input to the.
[0031]
Further, in a gas monitoring method for analyzing underground gas when carbon dioxide is introduced into the ground to fix the carbon dioxide gas, a laser generator 100 and a Raman scattered light analyzer are installed on the Raman probe 5 installed underground. The measurement signal is transmitted to the Raman scattered light analyzer 300 via the optical fiber means 200 installed in the ground, the laser transmitted from the laser generator 100 is received via the optical fiber means 200, and the ground signal is transmitted from the Raman probe 5 to the ground. By irradiating the gas to be measured inside, collecting the generated Raman scattered light, transmitting the collected Raman scattered light to the Raman scattered light analyzer 300 by the optical fiber means 200, and simultaneously displaying a plurality of spectra of the Raman scattered light on the same screen, A gas monitoring method for the underground fixation of carbon dioxide gas that simultaneously detects leaked gas is configured.
The Raman scattered light analyzer 300 can determine the component concentrations of carbon dioxide gas and other leaked gas.
[0032]
In a gas monitoring method for analyzing a gas in the ground or a gas leaked to the ground when carbon dioxide is introduced into the ground to fix the carbon dioxide gas, a Raman probe 5 installed in the ground or on the ground is provided with a laser generator 100. And the Raman scattered light analyzer 300 are connected via the optical fiber means 200, the laser transmitted from the laser generator 100 is received via the optical fiber means 200, and the measured gas in the ground or on the ground is received from the Raman probe. Irradiation, the generated Raman scattered light is collected, input to the optical fiber means 200 for transmission to the Raman scattered light analyzer 300, and the spectra of a plurality of Raman scattered lights are simultaneously displayed on the same screen, and a plurality of leaked gases are removed. A gas monitoring method for simultaneous detection of carbon dioxide underground is constructed.
[0033]
FIG. 4 shows a measurement example in which one or more Raman probes are arranged at a plurality of boreholes. In this example, a plurality of sets each including the first optical fiber 4, the Raman probe 5, and the second optical fiber 4A are provided side by side. However, the depth of the Raman probe 5 may be different. The optical fiber interfaces 31 and 61 can be selected from a plurality of Raman probes 5 and coupled to the laser 1 and the optical fibers 4 and 4A and the spectroscope 8 and the optical fibers 4 and 4A for measurement. By controlling the optical fiber interfaces 31 and 61 from the computer 11, the measurement points can be arbitrarily changed and automation is possible.
[0034]
Thus, when there is at least one detection system consisting of a probe and an optical fiber, a gas monitoring device provided with an optical fiber switch that can be connected by switching each detection system to a measurement system consisting of a laser light source, a Raman spectrometer, and a photodetector. Can be configured. That is, a plurality of sets including the first optical fiber 4, the Raman probe 5, and the second optical fiber 4A are provided in parallel between the laser generator 100 and the Raman scattered light analyzer 300, and a plurality of measurement systems are provided. A gas monitoring device for fixing underground carbon dioxide gas is provided, which is provided with an optical fiber switch (not shown) for switching to each measurement system.
[0035]
In the method of introducing carbon dioxide gas into the ground to fix the carbon dioxide gas, a Raman probe 5 installed in the ground irradiates a gas to be measured in the ground or on the surface of the ground to collect Raman scattered light generated, A method of introducing carbon dioxide gas into the ground and fixing the carbon dioxide gas while monitoring the leakage state of the carbon dioxide gas at an arbitrary point by the scattered light analyzer 300 can be provided. In this case, as described above, by controlling the optical fiber interfaces 31, 61, the carbon dioxide gas can be fixed while the measurement points are arbitrarily changed.
[0036]
FIG. 5 is a configuration diagram showing another embodiment of the present invention. The laser beam generated by the laser generator 1 in which the gas monitoring device 201 is disposed in the Raman probe 5 is guided to the sample gas chamber 32 through the collimator lens 22. In the sample gas chamber 32, a sample gas (measured gas) is guided from a sample gas inlet port 31 and exhausted from a sample gas exhaust pipe 33 connected to a suction pump.
[0037]
The laser beam guided to the sample gas chamber 32 generates Raman scattered light while being repeatedly reflected by two concave mirrors 23 in the sample gas chamber 32 which is a Raman scattering light device. A part of the scattered light is removed from the sample chamber 32 through the collimator lens 22 by the Raman notch filter 24 to remove the Rayleigh light, filtered by the bandpass filter 25 by the wavelength of the carbon dioxide gas peak, passed through the condenser lens 26 and passed through the photomultiplier tube At 27, it is converted into an electric signal.
[0038]
The electric signal is converted into a digital signal by an analog / digital converter (A / D converter) 28 including an amplifier and output by an optical fiber (cable) 30. 35 is a power cable.
[0039]
By using one or two sets of a combination of two or more semiconductor lasers as the laser generator 21, the laser output can be enhanced and the measurement sensitivity can be increased.
[0040]
The multiple reflection of the laser beam by the concave mirror 23 in the sample gas chamber 32 can increase the generation of Raman scattered light and increase the measurement sensitivity.
[0041]
The Raman spectral peak of methane was 2917 cm2 as shown in FIG.^-1Is the largest, the other peaks are extremely small, 1534 cm near the carbon dioxide gas peak^-1, 1306cm^-1Is a peak that can be almost ignored even at high concentrations of methane gas. Since the peaks of methane and carbon dioxide are sufficiently separated from the half width of the peak as shown in FIG. 2, the peaks can be easily separated by the band-pass filter 25. For this reason, in this embodiment, the gas concentration can be measured only by the band pass filter 25 without using a spectroscope. For this reason, it is possible to reduce the size and cost of the entire apparatus.
[0042]
By replacing the bandpass filter 25, other gases such as methane gas can be measured. By incorporating a bandpass filter exchange mechanism, it is possible to simultaneously measure the concentrations of two or more types of gas such as carbon dioxide gas and methane gas.
[0043]
Since the Raman scattered light signal, which is a measurement signal, is converted into a digital signal and transmitted through the optical fiber 4, communication over a long distance is possible. For this reason, it can be measured even at a deep borehole (100 m or more).
[0044]
The computer 29 transmits measurement data, controls and monitors a measuring device, controls a bandpass filter exchange mechanism, controls a suction pump, transmits measurement environment data, and receives control signals from a ground system.
[0045]
As described above, the Raman probe 5 has the laser generator 21 and the Raman scattered light device that generates Raman scattered light by the laser, and guides the laser generated by the laser generator 21 to the sample gas chamber through the collimator lens 22. The laser beam is repeatedly reflected by the concave mirror 23 provided in the sample gas chamber 32 to generate the Raman scattered light, and the Raman scattered light collected by the condenser lens 26 is converted into an electric signal by the photomultiplier 27. The gas monitoring device 201 is configured.
The Raman scattered light signal sent from the terrestrial communication device 210 is displayed on the screen by the image processing device.
[0046]
FIG. 6 shows a gas monitoring system using the gas monitoring device 201 shown in FIG.
The digital signal transmitted from the underground gas monitoring device 201 shown in FIG. 5 is transmitted to the ground communication device 210 via the optical cable 10. The data is evaluated from the ground-based ground communication device 210 to the communication base station 230 by wireless communication or communication means 220 such as an optical fiber or an electric wire.
When carbon dioxide is introduced into the ground to fix the carbon dioxide, gas monitoring is evaluated by arranging a plurality of gas monitoring devices over a wide area.
[0047]
【The invention's effect】
According to the present invention, in monitoring underground gas or gas leaking to the surface at the time of injecting and disposing of carbon dioxide into coal, oil, and natural gas fields, the use of Raman spectra is appropriate. It is possible to provide a gas monitoring device and method for fixing carbon dioxide gas underground that is effective for managing that the carbon dioxide is fixed.
Further, it is possible to provide a method for appropriately immobilizing carbon dioxide while monitoring gas continuously for a long period of time.
[Brief description of the drawings]
FIG. 1 is a diagram showing a configuration of a first embodiment of the present invention.
FIG. 2 is a diagram showing Raman spectra of methane gas and carbon dioxide gas.
FIG. 3 is a diagram showing Raman spectra of an underground gas component and carbon dioxide gas.
FIG. 4 is a diagram showing a configuration of a second exemplary embodiment of the present invention.
FIG. 5 is a diagram showing a configuration of a second embodiment.
6 is a diagram showing a gas monitoring system using the gas monitoring device 201 shown in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Laser, 2 ... Laser power supply, 3 ... Laser coupling optical system, 4 ... Optical fiber, 5 ... Raman probe, 6 ... Optical fiber adapter, 7 ... Raman notch filter, 8 ... Spectroscope, 9 ... Photodetector, 10 ... Photodetector controller, 11 ... Computer, 31 ... Optical fiber interface (laser side), 51 ... Raman probe A, 52 ... Raman probe B, 61 ... Optical fiber interface (spectrometer side), 100 ... Laser generator, 200 ... Optical fiber Means, 201: gas monitoring device, 300: Raman scattered light analyzer, 500: Raman probe body, 501: lens, 502: band pass filter, 503: dichroic filter, 504: mirror, 505: long pass filter.

Claims (14)

In a gas monitoring device that analyzes gas in the ground when carbon dioxide is fixed by introducing carbon dioxide into the ground,
Having a laser generator, a Raman probe disposed inside a hollow tube buried underground, and a Raman scattered light analyzer,
The Raman probe receives the laser transmitted from the laser generator, irradiates the target gas with the laser from the Raman probe, and transmits the generated Raman scattered light to the Raman scattered light analyzer. Optical fiber means is disposed inside the tube,
A gas monitoring device for fixing carbon dioxide gas underground, wherein the analyzed Raman scattered light is displayed on a screen by image processing by an image processing device. In a gas monitoring device that analyzes gas in the ground when carbon dioxide is fixed by introducing carbon dioxide into the ground,
Having a laser generator, a Raman probe buried in the ground, and a Raman scattered light analyzer,
The laser generator and the Raman probe, and further transmits the measurement signal to the Raman scattered light analyzer through the optical fiber means, respectively, the Raman probe and the Raman scattered light analyzer,
The Raman probe receives the laser transmitted from the laser generator via the optical fiber means, irradiates the laser to the gas to be measured from the Raman probe, and transmits the generated Raman scattered light to the Raman scattered light analyzer. A gas monitoring apparatus for fixing carbon dioxide gas underground. In a gas monitoring device that analyzes gas in the ground when carbon dioxide is fixed by introducing carbon dioxide into the ground,
Having a laser generator, a Raman probe arranged in a hollow tube buried underground, and a Raman scattered light analyzer,
The measurement signal is subjected to the Raman scattered light analysis through a first optical fiber and a second optical fiber in which the laser generator and the Raman probe are further disposed, and the Raman probe and the Raman scattered light analyzer are respectively disposed in the hollow tube. To the device,
The Raman probe receives a laser transmitted from the laser generator via a first optical fiber, irradiates the measured gas from the Raman probe with laser light, and generates the generated Raman scattered light to the Raman scattered light analyzer. A gas monitoring device for fixing carbon dioxide underground, wherein the gas is input to a second optical fiber for transmission. In claim 3, a plurality of sets including a first optical fiber, a Raman probe and a second optical fiber are provided in parallel between the laser generator and the Raman scattered light analyzer, and a plurality of measurement systems are provided. A gas monitoring device for fixing carbon dioxide underground, wherein the gas monitoring device is formed and provided with an optical fiber switch for switching to each measurement system. 5. The method according to claim 3, further comprising a first filter device for filtering laser light at an outlet of the first optical fiber and a second filter device for filtering laser light by removing a background including Raman light generated by the first optical fiber. A gas monitoring device for fixing carbon dioxide underground. 5. The method according to claim 3, wherein a first filter device for filtering the laser light at an outlet of the first optical fiber, a background including Raman light generated by the first optical fiber is removed, the laser light is filtered, and A second filter device for separating the Raman light from the scattering effect, a third filter device for removing the Rayleigh light contained in the separated Raman light, and a fourth filter device for further removing the Rayleigh light precisely. Characteristic gas monitoring device for underground fixation of carbon dioxide. 5. The method according to claim 3, wherein the first filter comprises a band-pass filter or a band-pass filter, the second filter comprises a dichroic filter or a dichroic beam splitter, the third filter comprises a long-pass filter, and the fourth filter comprises a notch. A gas monitoring device for fixing carbon dioxide underground, comprising a filter or a laser blocking filter. The gas monitoring apparatus according to claim 2 or 3, wherein the Raman scattering light analyzer analyzes spectra of carbon dioxide gas and other leaked gas. In a gas monitoring device that analyzes gas in the ground when introducing carbon dioxide gas into the ground and fixing the carbon dioxide gas,
The Raman probe buried in the ground has a laser generator and a Raman scattered light device that generates Raman scattered light by laser,
The laser generator irradiates a laser beam to the gas to be measured, and transmits a signal of the generated Raman scattered light to a terrestrial communication device by optical fiber means disposed inside the hollow tube,
The Raman scattered light signal sent from the ground communication device is analyzed by a Raman scattered light analyzer,
A gas monitoring device for fixing carbon dioxide underground, wherein the analyzed Raman scattered light signal is displayed on a screen by an image processing device. 10. The laser according to claim 9, wherein the laser generated by the laser generator is guided to a sample gas chamber through a collimator lens, and the laser beam is repeatedly reflected by a concave mirror provided in the sample gas chamber to generate the Raman scattered light. A gas monitoring device characterized in that Raman scattered light collected by an optical lens is converted into an electric signal by a photomultiplier tube. In a gas monitoring method for analyzing underground gas when carbon dioxide is introduced into the ground to fix the carbon dioxide gas,
A laser generator and a Raman scattered light analyzer are connected to a Raman probe installed in the ground via optical fiber means, a laser transmitted from the laser generator is received via the optical fiber means, and the ground is transmitted from the Raman probe to the ground. Irradiating a gas to be measured inside, collecting generated Raman scattered light, and transmitting the collected Raman scattered light to the Raman scattered light analyzer by the optical fiber means. 12. The gas monitoring method according to claim 11, wherein the Raman scattered light analyzer determines the concentration of components of carbon dioxide and other leaked gases. In a gas monitoring method for analyzing underground gas when carbon dioxide is introduced into the ground to fix the carbon dioxide gas,
A laser generator and a Raman scattered light analyzer were transmitted to the Raman scattered light analyzer through an optical fiber means installed in the ground to a Raman probe installed in the ground, and transmitted from the laser generator. A laser is received via the optical fiber means, the measured gas under the ground is irradiated from the Raman probe, collected Raman scattered light is collected, transmitted to the Raman scattered light analyzer by the optical fiber means, and a plurality of A gas monitoring method for fixing carbon dioxide underground, comprising simultaneously displaying the spectrum of Raman scattered light on the same screen and simultaneously detecting a plurality of leaked gases. In the method of fixing carbon dioxide by introducing carbon dioxide into the ground,
The target gas is irradiated with laser from a Raman probe installed in the ground, the generated Raman scattered light is collected, and carbon dioxide is immersed in the ground while monitoring the leakage of carbon dioxide at any point using a Raman scattered light analyzer. A method of fixing carbon dioxide by introducing gas.

Images