CN108693316B - Online automatic monitoring system and method for carbon dioxide gas concentration - Google Patents
Online automatic monitoring system and method for carbon dioxide gas concentration Download PDFInfo
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 86
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 43
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 43
- 238000012544 monitoring process Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000007789 gas Substances 0.000 claims abstract description 236
- 230000007613 environmental effect Effects 0.000 claims abstract description 81
- 238000001514 detection method Methods 0.000 claims abstract description 62
- 239000002680 soil gas Substances 0.000 claims abstract description 53
- 239000002689 soil Substances 0.000 claims description 70
- 239000000523 sample Substances 0.000 claims description 33
- 239000006260 foam Substances 0.000 claims description 14
- 238000005070 sampling Methods 0.000 claims description 12
- 238000009833 condensation Methods 0.000 claims description 11
- 230000005494 condensation Effects 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 229920000742 Cotton Polymers 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 7
- 230000009286 beneficial effect Effects 0.000 description 9
- 230000005540 biological transmission Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 208000001034 Frostbite Diseases 0.000 description 1
- 238000004566 IR spectroscopy Methods 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000006012 detection of carbon dioxide Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 210000004276 hyalin Anatomy 0.000 description 1
- 238000002329 infrared spectrum Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
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- 230000005012 migration Effects 0.000 description 1
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- 238000004080 punching Methods 0.000 description 1
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- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
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Abstract
The invention relates to an on-line automatic monitoring system and method for carbon dioxide gas concentration, belongs to the field of gas concentration monitoring, and solves the problem that in the prior art, the carbon dioxide concentration monitoring is low in scientificity and reliability. The system comprises: the air path control board is used for receiving a control instruction of the central control unit and controlling the on-off of the soil gas collection branch and the air gas collection branch; the central control unit is used for sending a control instruction to the gas circuit control board according to a set time sequence requirement and receiving a gas concentration detection result; and the gas concentration online detection unit is used for receiving the gas of the soil gas collection branch or the air gas collection branch and detecting the concentration to obtain a gas concentration detection result. The on-line automatic monitoring of the concentration of the carbon dioxide gas and various environmental parameters is realized.
Description
Technical Field
The invention relates to the technical field of gas concentration monitoring, in particular to an online automatic monitoring system for carbon dioxide gas concentration.
Background
The Carbon Dioxide Capture, Utilization and Storage technology (CCUS) is one of internationally recognized measures for directly and effectively reducing the emission of greenhouse gas Carbon Dioxide, and has a decisive role in realizing the temperature control target of controlling the global average temperature rise to be more than or equal to 2 ℃ before industrialization and striving to limit the temperature rise to be more than 1.5 ℃ before industrialization, which is advocated by Paris protocol.
The geological utilization and sealing technology of carbon dioxide is a large-scale long-period full-chain engineering process, taking an industrial geological storage engineering of millions of tons of sealed storage quantity every year as an example, the pressure influence range of the injected underground carbon dioxide can reach more than ten kilometers, the migration and diffusion range of the front edge of the carbon dioxide can reach thousands of meters, the environmental safety problems of fault activation, cracking of a cover layer, pollution to shallow underground water and the like can be caused, and the serious ecological disaster on the ground can be caused, so the safety and environmental risk of geological utilization and storage of the carbon dioxide are widely concerned in the application of the technology. To ensure the safety of the geological utilization and storage engineering of carbon dioxide, the leakage monitoring of carbon dioxide is needed to be carried out on the engineering site, and the concentration of carbon dioxide is an indicative index of leakage monitoring and early warning.
The traditional carbon dioxide monitoring technology is mainly used for monitoring the surface of the earth off-line, and the monitoring index usually only considers the concentration of carbon dioxide. Researches show that environmental factors such as air pressure, temperature, humidity, rainfall, soil temperature and humidity have obvious influence on the concentration of carbon dioxide, and the influence on the concentration of carbon dioxide is in a positive correlation relationship, particularly the influence on the concentration of carbon dioxide by the air temperature, the humidity and the soil temperature and humidity is very obvious; single subsurface or surface monitoring without consideration of environmental factors makes it difficult to correctly identify the source of carbon dioxide.
Disclosure of Invention
In view of the foregoing analysis, embodiments of the present invention provide an online automatic monitoring system and method for carbon dioxide gas concentration, so as to implement online automatic monitoring of various environmental parameters, such as air concentration of a carbon dioxide geological storage engineering site, carbon dioxide gas concentration in soil, soil temperature, soil moisture content, air temperature, air humidity, air pressure, rainfall, wind speed and wind direction, and solve the problem of low scientificity and reliability in monitoring carbon dioxide concentration of air and soil in the carbon dioxide geological storage engineering site.
The purpose of the invention is mainly realized by the following technical scheme:
one aspect of the present invention provides an online automatic monitoring system for carbon dioxide gas concentration, comprising:
at least one soil gas collector for collecting gas in the soil,
at least one air gas collector for collecting gas in the air,
the air path control panel is used for receiving a control instruction of the central control unit and controlling the on-off of the soil gas acquisition branch and the air gas acquisition branch;
the central control unit is used for sending a control instruction to the gas circuit control board according to a set time sequence requirement and receiving a gas concentration detection result;
and the gas concentration online detection unit is used for receiving the gas of the soil gas collection branch or the air gas collection branch and detecting the concentration to obtain a gas concentration detection result.
The beneficial effects of the above technical scheme are: the system can realize automatic on-line detection of the concentration of the gas in the soil and the air.
On the basis of the scheme, the invention is further improved as follows:
further, the central control unit sends a control instruction to the air circuit control board according to a set time sequence requirement, and the control instruction comprises the following steps: the central control unit sequentially opens an air gas collecting branch, cuts off the air gas collecting branch, opens a soil gas collecting branch and cuts off the soil gas collecting branch according to the set on-off frequency.
The beneficial effects of the further technical scheme are as follows: and the central control unit switches on and off the air gas collecting branch and switches on the soil gas collecting branch according to the set time sequence requirement, so that the switching of the detection of the air gas concentration and the detection of the soil gas concentration is realized.
Further, the system also comprises a circulating pump, and the circulating pump is arranged at the tail gas discharge end of the gas concentration online detection unit; the central control unit sends a circulating pump switch control instruction to the air path control panel so as to control the opening and closing of the circulating pump.
The beneficial effects of the above further scheme are: and a circulating pump is arranged at the tail gas discharge end of the gas concentration online detection unit and is used for providing power drive for gas circuit circulation.
Furthermore, the system also comprises an environmental parameter control unit, wherein the environmental parameter control unit comprises an environmental parameter collector and an environmental control board; the environment parameter collector comprises a soil temperature sensor, a soil moisture content sensor, a rain measuring cylinder, an air temperature sensor, an air humidity sensor, an air pressure sensor and a wind speed vane; soil temperature sensor, soil moisture content sensor, rain gauge, air temperature sensor, air humidity sensor, baroceptor, wind speed vane are used for gathering soil temperature, soil moisture content, rainfall, air temperature, air humidity, atmospheric pressure, wind speed and wind direction respectively to send the environmental parameter collection result of gathering for environmental control panel.
The beneficial effects of the above further scheme are: the system can automatically detect the concentration of gas in soil and air on line and also collect environmental parameters such as soil temperature, soil moisture content, rainfall, air temperature, air humidity, air pressure, wind speed, wind direction and the like.
Further, the central control unit sends an environmental parameter acquisition control instruction to the environmental control board so as to control the sampling time and frequency of the environmental parameter acquisition unit; when any branch of the soil gas collection branch and the air gas collection branch is opened and the circulating pump is started, the environmental parameter collector starts to sample to obtain an environmental parameter collection result.
The beneficial effects of the above further scheme are as follows: the central control unit controls the collection of the gas concentration in the soil or air to be carried out simultaneously with the environmental parameters.
Further, the soil gas collector comprises a gas collecting flower cylinder, a foam plug and a first condensate probe;
the gas collecting flower cylinder is buried in soil, the bottom of the gas collecting flower cylinder is open, and the first condensate water probe is arranged at the top of the inner side of the gas collecting flower cylinder and communicated with the soil gas collecting branch; the foam plug is placed at the opening at the bottom of the gas collecting cylinder; the foam plug is used for isolating particle residues, and the first condensation probe is used for drying gas;
the air gas collector is arranged on the ground surface monitoring bracket and comprises a rain cover and a second condensate probe; the second condensate probe is communicated with the air gas collecting branch and is positioned inside the rain cover;
rain-proof cover for prevent that the rainwater from getting into the gaseous branch road of gathering of air, the second is congealed water probe and is used for dry gas.
The beneficial effects of the above further scheme are: and collecting dry gas in soil and air respectively by the soil gas collector and the air gas collector.
Furthermore, the central control unit receives the gas concentration detection result of the gas concentration online detection unit, receives the environmental parameter acquisition result of the environmental parameter acquisition unit, and packages the gas concentration detection result and the environmental parameter acquisition result according to the acquisition time sequence.
The beneficial effects of the above further scheme are: the central control unit packs and processes the gas concentration detection result and the environmental parameter acquisition result according to the acquisition time sequence; the gas concentration detection result and the environmental parameters are conveniently analyzed in time sequence.
In another aspect of the present invention, a method for on-line automatic monitoring of carbon dioxide gas concentration includes the following steps:
arranging a soil gas collector, a soil temperature sensor and a soil moisture content sensor in soil; an air gas collector and a sensor, a rain gauge, an air temperature sensor, an air humidity sensor, an air pressure sensor and an air speed vane are arranged on the ground surface monitoring support;
the central control unit sends a time sequence control instruction and a circulating pump switch control instruction to the gas circuit control panel and sends an environmental parameter acquisition control instruction to the environmental control panel;
the gas circuit control board alternately controls the on-off of the soil gas acquisition branch or the air gas acquisition branch according to a time sequence control instruction;
the gas circuit control board controls the opening of a circulating pump at the tail gas discharge end of the gas concentration online detection unit according to the circulating pump switch control instruction;
the gas concentration online detection unit alternately receives gas of the soil gas collection branch or the air gas collection branch, and performs concentration detection to obtain a gas concentration detection result;
and the environmental parameter collector samples according to the sampling frequency and time in the environmental parameter collection control instruction to obtain an environmental parameter collection result.
The beneficial effects of the above technical scheme are:
the on-line automatic monitoring of various environmental parameters such as gas concentration in air and soil, soil temperature, soil moisture content, air temperature, air humidity, air pressure, rainfall, wind speed and wind direction and the like is realized.
Furthermore, the central control unit receives the gas concentration detection result of the gas concentration online detection unit, receives the environmental parameter acquisition result of the environmental parameter acquisition unit, and packages the gas concentration detection result and the environmental parameter acquisition result according to the acquisition time sequence.
Further, the central control unit remotely sends the packed result to the data control center.
The beneficial effects of the above further scheme are: the central control unit remotely sends the packed result to a data control center; the remote acquisition of the monitoring data of the gas concentration and the environmental parameters is realized.
In the invention, the technical schemes can be combined with each other to realize more preferable combination schemes. Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, wherein like reference numerals are used to designate like parts throughout.
FIG. 1 is a schematic structural view of a system described in embodiment 1 of the present invention;
fig. 2 is a schematic flow chart of the method described in embodiment 2 of the present invention.
The attached drawings are as follows: 1-a gas collection unit for soil and air; 11-a gas collecting flower cylinder; 12-a first condensation probe; 13-a foam plug; 14-soil gas delivery pipe; 15-rain cover; 16-air gas delivery pipe; 17-a second condensation probe; 2-gas circulation and control unit; 21-air channel control board; 22-a soil gas circuit control electromagnetic valve; 23-air gas circuit control solenoid valve; a 24-tee joint; 25-a circulation pump; 26-a tail gas discharge pipe; 3-gas concentration online detection unit; 4-an environmental parameter acquisition unit; 41-environmental control panel; 42-soil temperature sensor; 43-soil moisture content sensor; 44-rain measuring cylinder; 45-air temperature sensor; 46-an air humidity sensor; 47-air pressure sensor; 48-wind speed vane; 5-a central control unit; 51-a tablet computer; 52-a keyboard; 53-industrial liquid crystal screen; 6-a wireless data transmission unit; 61-wireless transmission module connection; 62-an antenna; 7-a solar power supply unit; 72-solar panel; 71-a charge-discharge controller; 73-storage battery.
Detailed Description
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate preferred embodiments of the invention and together with the description, serve to explain the principles of the invention and not to limit the scope of the invention.
Example 1
In an embodiment of the present invention, an online automatic monitoring system for carbon dioxide gas concentration is provided, and a schematic structural diagram of the system is shown in fig. 1. The system comprises: the system comprises a soil and air gas acquisition unit 1, a gas circulation and control unit 2, a gas concentration online detection unit 3, an environmental parameter acquisition unit 4, a central control unit 5, a wireless data transmission unit 6 and a solar power supply unit 7; the gas collecting unit 1 for soil and air comprises a soil collector and an air collector; the soil collector is buried in soil, the air collector is arranged on the ground surface monitoring support and is used for collecting gas in the soil or air respectively, and the collected gas is conveyed to the gas concentration online detection unit 3 through the soil gas collection branch and the air gas collection branch respectively.
Optionally, the soil collector comprises a gas collecting flower cylinder 11, a foam plug 12 and a first condensation probe 13; the gas collecting flower cylinder is buried in soil, the bottom of the gas collecting flower cylinder is open, and the first condensate water probe is arranged at the top of the inner side of the gas collecting flower cylinder and communicated with a soil gas collecting branch; the foam plug is arranged at the opening at the bottom of the gas-collecting cylinder; the foam plug is used for isolating particle residues, and the first condensation probe is used for drying gas.
Optionally, the air gas collector is arranged on the ground surface monitoring bracket and comprises a rain cover and a second condensation probe; the second condensate probe is communicated with the air gas collecting branch and is positioned inside the rain cover; rain-proof cover for prevent that the rainwater from getting into the gaseous branch road of gathering of air, the second is congealed water probe and is used for drying gas.
When the device is used, carbon dioxide gas in soil enters the gas collecting flower cylinder 11 of the soil gas collecting unit 1 through holes of the gas collecting flower cylinder 11 (the gas collecting flower cylinder is made of a plastic pipe with the diameter of 40mm through punching, is mainly used for supporting a soil space and has the characteristic of corrosion resistance, other pipes with similar functions can also be used as the gas collecting flower cylinder), filter cotton is placed in the gas collecting flower cylinder 11 in advance to prevent large particles from entering, and a foam plug 12 is placed at the bottom of the gas collecting flower cylinder to ensure that only soil gas with a certain depth is tested; soil gas gets into soil gas collection branch road through first water probe 13 that congeals, and is concrete, gets into soil gas delivery pipe 14 (for the soft rubber hyaline tube of external diameter 6mm, internal diameter 4mm, the material is stable, prevents frostbite, can observe the dust of the inside simultaneously).
The soil gas conveying pipe 14 is connected to an air inlet end of an on-off control switch, specifically, the soil gas conveying pipe is connected to an air inlet end of a soil gas circuit control switch 22 of the gas circulation and control unit 2, carbon dioxide gas in air passes through the rain cover 15 and the second condensate probe 17, moisture in the air is filtered and enters an air gas collecting branch, specifically, the carbon dioxide gas enters the air gas conveying pipe 16 (the material of the air gas conveying pipe is the same as that of the soil gas conveying pipe), and the air gas conveying pipe 16 is connected to the on-off control switch, specifically; an air inlet end of an air gas path control switch 23 of the gas circulation and control unit 2, in the embodiment, a soil gas path control switch and an air gas path control switch are both realized by adopting electromagnetic valves; the air outlet end of the soil air path control electromagnetic valve 22 and the air outlet end of the air path control electromagnetic valve 23 are respectively connected to the air inlet end of the tee joint 24.
The gas outlet end of the tee joint 24 is connected with the sample gas inlet end of the gas concentration on-line detection unit 3, carbon dioxide concentration measurement is carried out after the gas enters the gas concentration on-line monitoring unit 3, the detected gas enters the gas inlet end of a circulating pump 25 of the gas circulation and control unit 2 through a tail gas discharge end, the circulating pump 25 is a power source for the whole gas circulation movement, and the detected gas is discharged into distant and non-interfering air through a tail gas discharge pipe 26 (the material of the tail gas discharge pipe is the same as that of a soil gas conveying pipe) at the gas outlet end of the circulating pump 25; each part of the gas circulation and control unit 2 realizes the on-off and switching of the gas path through the gas path control board 21.
The gas circuit control board 21 is an execution end of the central control unit 5 for controlling gas circuit switching and on-off through a serial port, and mainly comprises a single chip microcomputer, a drive circuit and a relay, wherein the single chip microcomputer can receive a control signal from the central control unit, the control signal is a secondary code (for expansion, eight-channel gas circuit control plate is designed, namely control of a plurality of unit gas circuits can be realized), relays of different channels are controlled through a coding mode, the high and low levels of the single chip microcomputer are not enough to start the electromagnetic valve, the drive circuit is added, the drive current is increased, the relay is driven, and the electromagnetic valve is driven by the relay;
the gas concentration online detection unit 3 is a carbon dioxide gas detection module, and is mainly used for detecting the concentration of carbon dioxide in a gas sample through infrared absorption spectroscopy. Because the infrared spectrum has certain absorptivity in the carbon dioxide gas transmission process, the spectral lines are relatively concentrated, the intensity is in direct proportion to the gas concentration, so the concentration detection can be realized by the method, the detection unit comprises a single chip microcomputer, a gas channel, a detection pool and the like, and the gas concentration online detection unit 3 is provided with a gas inlet and a gas outlet.
The air channel control board 21 is connected to the tablet personal computer 51 of the central control unit 5 through a serial port to realize data communication; the temperature and the moisture content of the soil are respectively collected by a soil temperature sensor 42 and a soil moisture content sensor 43 of the environmental parameter acquisition unit 4, and the data are transmitted to an environmental control panel 41 of the environmental parameter acquisition unit 4 by cables, the rainfall, the air temperature, the air humidity, the air pressure, the wind speed and the wind direction are respectively collected by a rainfall cylinder 44, an air temperature sensor 45, an air humidity sensor 46, an air pressure sensor 47 and a wind speed vane 48 of the environmental parameter acquisition unit 4, and the obtained data are transmitted to the environmental control panel 41 of the environmental parameter acquisition unit 4 by cables.
The environment control panel 41 is in data communication with the tablet computer 51 of the central control unit 5 through a serial port, the tablet computer 51 receives and stores data, and the tablet computer is connected with the keyboard 52 and the industrial liquid crystal screen 53 through the USB, so that input of control instructions and display of data can be completed, and man-machine interaction is realized.
The tablet personal computer 51 of the central control unit 5 is connected with the wireless transmitting module 61 of the wireless data transmission unit 6 through a serial port, and wireless signals enter a 4G/3G/GPRS network through an antenna 62 to realize data communication; the solar power supply unit 7 provides power support for the whole system, the solar panel 72 of the solar power supply unit 7 converts light energy into electric energy and stores the electric energy in the storage battery 73 through the charging and discharging controller 71, and the charging and discharging controller 71 is responsible for providing power for the whole system.
In a specific embodiment, the air path control board 21 is configured to receive a control instruction from the central control unit 5, and control the on/off of the soil gas collection branch and the air gas collection branch and the on/off of the circulation pump 25 through an electromagnetic valve;
the gas concentration online detection unit 3 is used for receiving the gas of the soil gas collection branch or the air gas collection branch and carrying out concentration detection to obtain a gas concentration detection result;
the central control unit 5 sends a control instruction to the gas circuit control board 21 according to a set time sequence requirement, specifically, the central control unit 5 sequentially opens an air gas collecting branch, cuts off the air gas collecting branch, opens a soil gas collecting branch and cuts off the soil gas collecting branch according to a set on-off frequency;
the central control unit 5 sends a circulating pump 25 on-off control instruction to the air path control board 21 to control the on and off of the circulating pump 25;
the environmental parameter collector comprises a soil temperature sensor 42, a soil moisture content sensor 43, a rain measuring cylinder 44, an air temperature sensor 45, an air humidity sensor 46, an air pressure sensor 47, a wind speed vane 48 and the like;
the central control unit 5 sends an environmental parameter acquisition control instruction to the environmental control board 41 to control the sampling time and frequency of the environmental parameter acquisition device; when any one of the soil gas collection branch and the air gas collection branch is opened and the circulating pump 25 is started, the environmental parameter collector starts sampling to obtain an environmental parameter sampling result.
The central control unit 5 receives the gas concentration detection result of the gas concentration online detection unit 3, meanwhile, the central control unit 5 receives the environment parameter acquisition result of the environment parameter acquisition unit, the gas concentration detection result and the environment parameter acquisition result can be displayed on line in a tablet personal computer of the central control unit 5, the central control unit 5 packs the gas concentration detection result and the environment parameter acquisition result according to the acquisition time sequence, and finally sends the packed result to the data control center in a remote mode.
The environment control panel 41 is composed of a single chip microcomputer, an analog-to-digital conversion circuit and a signal conditioning and amplifying circuit, wherein rainfall is technical pulse, and wind speed, wind direction, air temperature, air humidity, air pressure and the like are all analog signals, so the environment control panel mainly completes the conversion and collection of data, a collection command of the environment control panel is sent by the central control unit through a serial port, and the environment control panel controls each sensor to collect the data after receiving the command and returns the data to the central control unit;
the data control center is an assembly of a hardware server and software, an external network IP with a fixed port number is required to be used for receiving data, a software program running on the server is used for receiving the data from the IP and the port number, storing the data into a database locally, displaying the data in real time and drawing a curve, and meanwhile, short message early warning can be set according to an early warning threshold value.
It should be noted that, in a gas sampling unit for soil and air, the soil gas collector and the air gas collector may each include two or more than two gas collectors for collecting gas at different positions (only 1 is exemplarily shown in the figure); the environment parameter acquisition unit can acquire environment parameters such as soil temperature, soil moisture content, air temperature, air humidity, atmospheric pressure, rainfall, wind speed and wind direction, and each parameter is according to presetting sampling interval, and the online measurement environmental parameter changes. The sampling interval, the on-off time sequence and the frequency of the air gas acquisition branch and the soil gas acquisition branch can be remotely controlled by a tester through a central control unit or a data control center.
Example 2
The embodiment of the invention provides an online automatic monitoring method for carbon dioxide gas concentration. Fig. 2 is a schematic flow chart of the method, which includes the following steps:
arranging a soil gas collector, a soil temperature sensor and a soil moisture content sensor in soil; an air gas collector and a sensor, a rain gauge, an air temperature sensor, an air humidity sensor, an air pressure sensor and an air speed vane are arranged on the ground surface monitoring support;
the central control unit sends a time sequence control instruction and a circulating pump switch control instruction to the gas circuit control panel and sends an environmental parameter acquisition control instruction to the environmental control panel;
the gas circuit control board alternately controls the on-off of the soil gas acquisition branch or the air gas acquisition branch according to a time sequence control instruction;
the gas circuit control board controls the opening of a circulating pump at the tail gas discharge end of the gas concentration online detection unit according to the circulating pump switch control instruction;
the gas concentration online detection unit alternately receives gas of the soil gas collection branch or the air gas collection branch, and performs concentration detection to obtain a gas concentration detection result;
the environmental parameter collector samples according to the sampling frequency and time in the environmental parameter collection control instruction;
the central control unit receives a gas concentration detection result of the gas concentration online detection unit, receives an environmental parameter acquisition result of the environmental parameter acquisition unit, and packages the gas concentration detection result and the environmental parameter acquisition result according to the acquisition time sequence; and finally, remotely sending the packed result to a data control center.
And after sampling is finished, the central control unit sends a closing control instruction to the gas circuit control board and the environment acquisition board, closes each acquisition branch, and finally closes the circulating pump at the tail gas discharge end of the gas concentration online detection unit.
In summary, the invention provides an online automatic monitoring system and method for carbon dioxide gas concentration, which can automatically monitor the carbon dioxide concentration of two-phase media of air and soil online, and simultaneously take the influences of various environmental parameters such as soil temperature, soil moisture content, air temperature, air humidity, air pressure, rainfall, wind speed, wind direction and the like into consideration, and simultaneously, more than two measuring sample points are provided; the method can realize the detection of carbon dioxide gas in air and soil and various environmental parameters such as soil temperature, soil moisture content, air temperature, air humidity, air pressure, rainfall, wind speed and wind direction, accurately judge the concentration of the deep source carbon dioxide and the environmental parameters, and solve the problem of low scientificity and reliability of monitoring the concentration of the carbon dioxide in the air and soil of a geological storage engineering site.
It should be noted that the same or similar parts may be referred to each other between the above embodiments.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (9)
1. The utility model provides an online automatic monitoring system of carbon dioxide gas concentration which characterized in that includes:
the soil gas collector is used for collecting gas in soil and comprises a gas collecting cylinder, a foam plug, a first condensate probe and filter cotton;
the gas collecting flower cylinder is buried in soil, the bottom of the gas collecting flower cylinder is open, and the first condensate water probe is arranged at the top of the inner side of the gas collecting flower cylinder and communicated with a soil gas collecting branch; the foam plug is placed at the opening at the bottom of the gas collecting cylinder; the filter cotton is placed in the gas-collecting flower cylinder; the foam plug is used for isolating residual particles, the first condensation probe is used for drying gas, and the filter cotton is used for preventing the particles from entering the gas collection cylinder;
the air gas collector is arranged on the ground surface monitoring bracket and comprises a rain cover and a second condensate probe; the second condensate probe is communicated with the air gas collecting branch and is positioned inside the rain cover; the rain cover is used for preventing rainwater from entering the air gas collection branch, and the second condensation probe is used for drying gas;
the air path control panel is used for receiving a control instruction of the central control unit and controlling the on-off of the soil gas acquisition branch and the air gas acquisition branch;
the central control unit is used for sending a control instruction to the gas circuit control board according to a set time sequence requirement and receiving a gas concentration detection result;
and the gas concentration online detection unit is used for receiving the gas of the soil gas collection branch or the air gas collection branch and detecting the concentration to obtain a gas concentration detection result.
2. The system of claim 1, wherein the central control unit sends a control command to the gas circuit control board according to a set time sequence requirement, and the control command comprises: the central control unit sequentially opens an air gas collecting branch, cuts off the air gas collecting branch, opens a soil gas collecting branch and cuts off the soil gas collecting branch according to the set on-off frequency.
3. The system according to claim 2, further comprising a circulating pump disposed at a tail gas discharge end of the gas concentration online detection unit; the central control unit sends a circulating pump switch control instruction to the air path control panel so as to control the opening and closing of the circulating pump.
4. The system of claim 3, further comprising an environmental parameter control unit, wherein the environmental parameter control unit comprises an environmental parameter collector and an environmental control board;
the environment parameter collector comprises a soil temperature sensor, a soil moisture content sensor, a rain measuring cylinder, an air temperature sensor, an air humidity sensor, an air pressure sensor and a wind speed vane; soil temperature sensor, soil moisture content sensor, rain gauge, air temperature sensor, air humidity sensor, baroceptor, wind speed vane are used for gathering soil temperature, soil moisture content, rainfall, air temperature, air humidity, atmospheric pressure, wind speed and wind direction respectively to send the environmental parameter collection result of gathering for environmental control panel.
5. The system of claim 4, wherein the central control unit sends an environmental parameter acquisition control instruction to the environmental control board to control the sampling time and frequency of the environmental parameter acquisition unit; when any branch of the soil gas collection branch and the air gas collection branch is opened and the circulating pump is started, the environmental parameter collector starts to sample to obtain an environmental parameter collection result.
6. The system of claim 5, wherein the central control unit receives the gas concentration detection result of the gas concentration online detection unit, and simultaneously, the central control unit receives the environmental parameter acquisition result of the environmental parameter acquisition unit, and packages the gas concentration detection result and the environmental parameter acquisition result according to the acquisition time sequence.
7. An on-line automatic monitoring method for carbon dioxide gas concentration is characterized by comprising the following steps:
arranging a soil gas collector, a soil temperature sensor and a soil moisture content sensor in soil; an air gas collector, a rain gauge, an air temperature sensor, an air humidity sensor, an air pressure sensor and an air speed vane are arranged on the ground surface monitoring support;
the soil gas collector comprises a gas collecting cylinder, a foam plug, a first condensate probe and filter cotton; the gas collecting flower cylinder is buried in soil, the bottom of the gas collecting flower cylinder is open, and the first condensate water probe is arranged at the top of the inner side of the gas collecting flower cylinder and communicated with a soil gas collecting branch; the foam plug is placed at the opening at the bottom of the gas collecting cylinder; the filter cotton is placed in the gas-collecting flower cylinder; the foam plug is used for isolating residual particles, the first condensation probe is used for drying gas, and the filter cotton is used for preventing the particles from entering the gas collection cylinder;
the air gas collector comprises a rain cover and a second condensation probe; the second condensate probe is communicated with the air gas collecting branch and is positioned inside the rain cover; the rain cover is used for preventing rainwater from entering the air gas collection branch, and the second condensation probe is used for drying gas;
the central control unit sends a time sequence control instruction and a circulating pump switch control instruction to the gas circuit control panel and sends an environmental parameter acquisition control instruction to the environmental control panel;
the gas circuit control board alternately controls the on-off of the soil gas acquisition branch or the air gas acquisition branch according to a time sequence control instruction;
the gas circuit control board controls the opening of a circulating pump at the tail gas discharge end of the gas concentration online detection unit according to the circulating pump switch control instruction;
the gas concentration online detection unit alternately receives gas of the soil gas collection branch or the air gas collection branch, and performs concentration detection to obtain a gas concentration detection result;
and the environmental parameter collector samples according to the sampling frequency and time in the environmental parameter collection control instruction to obtain an environmental parameter collection result.
8. The method of claim 7, wherein the central control unit receives the gas concentration detection result of the gas concentration online detection unit, and simultaneously, the central control unit receives the environmental parameter acquisition result of the environmental parameter acquisition unit, and packages the gas concentration detection result and the environmental parameter acquisition result according to the acquisition time sequence.
9. The method of claim 8, further comprising: and the central control unit remotely sends the packed result to a data control center.
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| CN113433297B (en) * | 2021-08-30 | 2022-01-18 | 山东汇金海智慧农业研究院有限公司 | Real-time online detection method for carbon dioxide concentration in soil |
| CN114428071A (en) * | 2021-11-30 | 2022-05-03 | 核工业北京地质研究院 | CO in space air and shallow soil2Method for quickly measuring concentration on site |
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