CN106198117A - The in-site detecting device of gas parameter and assay method - Google Patents
The in-site detecting device of gas parameter and assay method Download PDFInfo
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- CN106198117A CN106198117A CN201510270108.7A CN201510270108A CN106198117A CN 106198117 A CN106198117 A CN 106198117A CN 201510270108 A CN201510270108 A CN 201510270108A CN 106198117 A CN106198117 A CN 106198117A
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Abstract
In-site detecting device and the assay method of a kind of gas parameter are disclosed.Determinator includes: detection pipe, it is arranged in the measurement well of desired depth, opening bottom detection pipe contacts with measuring well shaft bottom soil layer, and in detection pipe, adjacent openings position has the first sealing dividing plate, and the tube wall of detection pipe and first seals dividing plate and shaft bottom soil layer forms collection chamber；And gas parameter analyser, it is arranged in detection pipe, the special parameter of gas to be measured in situ detection collection chamber.
Description
Technical field
The present invention relates to detection field, in particular it relates to the in-site detecting device of a kind of gas parameter and survey
Determine method.
Background technology
At present, can be used for measuring the method for (such as, carbon dioxide) gas flux mainly include case method,
Minute air flow, super large case long light path infra-red chromatography and isotope method.Most common of which is micro-gas
As learning method and case method.Case method is divided into again closed chamber method and dynamic case method, and wherein closed chamber method is to apply the most
One of universal method.
Closed chamber method is a kind of fairly simple flux measurement method, and its casing is by stable chemical nature
Material is made, and volume and floor space have exact value.Chest bottom surface opening, has lid above, and lid can spirit
Live and open and close.During measurement, being got up by tested ground face shield with chest, within keeping case, air is with extraneous
In the case of there is no any exchange, the measurement of concetration 1 time to gas to be measured in case at set intervals, so
Utilize functional relationship can obtain quilt cover surface gas over time according to tested gas concentration afterwards
Emission flux.
But said method is only capable of realizing detecting the flux of the carbon dioxide of surface soil, nothing
The carbon dioxide flux of in geology cap rock or at random layer depth is detected by method.
For above-mentioned technical problem, prior art there is no good solution.
Summary of the invention
It is an object of the invention to provide a kind of equipment and method, the equipment provided by the present invention and method,
Such as the gas in geology cap rock can the most upwards be revealed and carries out under conditions of gas buries storage
Detection.
To achieve these goals, the invention provides the in-site detecting device of a kind of gas parameter, this survey
Determine device to include: detection pipe, be configured to be arranged in the measurement well with desired depth, this detection pipe
The opening of bottom contacts with described measurement well shaft bottom soil layer, and in this detection pipe, neighbouring described aperture position has
First seals dividing plate, and the tube wall of described detection pipe seals dividing plate with described first and described shaft bottom soil layer is formed
Collection chamber；And gas parameter analyser, it is arranged in described detection pipe, is configured in situ detection institute
State the special parameter of gas to be measured in collection chamber.
Further, this determinator also includes: Temperature Humidity Sensor, be arranged on described first seal every
On plate, it is configured to detect the temperature and humidity in described collection chamber；And pressure transducer, it is arranged on institute
State on the first sealing dividing plate, be configured to detect the pressure in described collection chamber.
Further, this determinator also includes: circulation line, has and entering that described collection chamber communicates
Mouth and outlet；And dehumidifier, it is configured to the gas dehumidification to flowing through this dehumidifier and is dried, described dehumidifying
Device is sequentially connected in series in described circulation line from the inlet to the outlet with described gas parameter analyser.
Further, this determinator also includes: air pump, and this air pump is arranged on institute in described circulation line
State between dehumidifier and described gas parameter analyser, the gas being configured to extract in described collection chamber with
And the gas extracted is delivered to described gas parameter analyser.
Further, this determinator also includes: electromagnetic valve, is arranged in described circulation line, is joined
It is set in the pressure when described pressure transducer and described Temperature Humidity Sensor detect, temperature and humidity
Open when at least one exceedes predetermined threshold to lose heart, and described pressure transducer and described after disappointing
Pressure, temperature and humidity that Temperature Humidity Sensor detects are closed time invariable.
Further, the inherent described first sealing dividing plate of this detection pipe also has away from the side of described opening
Second seals dividing plate, and described second seals dividing plate seals dividing plate and described detection inside pipe wall with described first
Surround closed space, described Temperature Humidity Sensor, described pressure transducer, described gas concentration analyzer
And described dehumidifier is in described closed space.
Further, described determinator also includes running through the described second ventilation duct sealing dividing plate, is used for
By described closing space with ground environment conducting to ventilate.
Further, described determinator also includes: be arranged on the immersible pump in described collection chamber and hydrops
Detector, described hydrops detector is configured to detect the water accumulation level in described collection chamber, institute
State immersible pump to be configured to when in described collection chamber, water accumulation level is opened with by hydrops when reaching predetermined altitude
Discharge described collection chamber.
Further, the opening part bottom described detection pipe is provided with gas collection dividing plate, and this gas collection dividing plate has
Multiple supplied gas are by enter the hole of described collection chamber.
Further, described determinator also includes ground surface sample suction nozzle, and this ground surface sample suction nozzle leads to
Cross electromagnetic valve to connect with described circulation line, described gas to be measured can be delivered to ground.
Another aspect of the present invention, additionally provides the in-situ determination method of a kind of gas parameter, this mensuration
Method includes: excavation has the measurement well of desired depth；In this measurement well, arrange that detection pipe is with in this survey
Collection chamber, wherein, the opening bottom this detection pipe and described measurement well shaft bottom soil layer are formed on the bottom of amount well
Contact, in this detection pipe, neighbouring described aperture position has sealing dividing plate, the tube wall of described detection pipe and institute
State sealing dividing plate and described shaft bottom soil layer forms described collection chamber；And in collection chamber described in situ detection
The certain parameter data of gas to be measured.
Further, this assay method also includes: the temperature of the gas in collection chamber described in situ detection,
Humidity and pressure.
Further, this assay method also includes: detect in position gas in described collection chamber temperature,
Before the certain parameter data of pressure and gas to be measured, the gas in described collection chamber is carried out dehumidifying dry
Dry.
Further, this assay method also includes: when in detected pressure, temperature and humidity extremely
When few one exceedes predetermined threshold, discharge the gas in described collection chamber；And when described gas collection after release
Stop release when the pressure of the gas in room, temperature and humidity are invariable, then proceed in situ detection institute
State the temperature of gas in collection chamber, pressure and gas certain parameter data to be measured.
Further, this assay method also includes: detect described collection chamber on ground and ground in-situ respectively
In the gas certain parameter data to be measured of gas；And the detection data of comparison ground and ground in-situ with
Verify.
By technique scheme, the parameter of in situ detection gas to be measured can be realized, it is to avoid gas is tested
Before surveying, parameter is affected by transmission range and environment and is changed and/or delayed.
Other features and advantages of the present invention will be described in detail in detailed description of the invention part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and constitutes the part of description, with
Detailed description below is used for explaining the present invention together, but is not intended that limitation of the present invention.?
In accompanying drawing:
Fig. 1 is the in-site detecting device example arrangement of the gas flux according to one embodiment of the present invention
Schematic diagram；
Fig. 2 is the in-situ determination method flow chart of the gas flux according to embodiment of the present invention；And
Fig. 3 is the exemplary knot of in-site detecting device of the gas flux according to another embodiment of the present invention
Structure schematic diagram.
Detailed description of the invention
Below in conjunction with accompanying drawing, the detailed description of the invention of the present invention is described in detail.It should be appreciated that
Detailed description of the invention described herein is merely to illustrate and explains the present invention, is not limited to this
Bright.
According to an embodiment of the invention, it is provided that the in-site detecting device of a kind of gas parameter, this survey
Determine device to include: detection pipe, be configured to be arranged in the measurement well with desired depth, this detection pipe
The opening of bottom contacts with described measurement well shaft bottom soil layer, and in this detection pipe, neighbouring described aperture position has
First seals dividing plate, and the tube wall of described detection pipe seals dividing plate with described first and described shaft bottom soil layer is formed
Collection chamber；And gas parameter analyser, it is arranged in described detection pipe, is configured in situ detection institute
State the special parameter of gas to be measured in collection chamber.
The special parameter of gas to be measured can include that various conventional Tong Guo common instrument is checked or analyzed
The data obtained, the data such as such as concentration, density, flow, as persons skilled in the art understand
, other such as data such as pressure, temperature, time can be combined according to the special parameter that detection obtains and enter one
Step calculates the flux of other supplemental characteristics that cannot directly measure, such as gas that obtain gas.Herein
In, it is two or more that gas parameter includes that the special parameter that can be directly detected by instrument and needing is combined
Special parameter calculates the parameter obtained.
Shown in Fig. 1, illustrate how to measure gas to be measured as a example by using gas concentration analyzer
The flux of body.Fig. 1 is the in-site detecting apparatus structure signal of the gas flux according to embodiment of the present invention
Figure.As it is shown in figure 1, the in-site detecting device of the gas flux of present invention offer may include that detection pipe
1, it is configured to be arranged in the measurement well with desired depth, the opening bottom this detection pipe 1 and institute
Stating the soil layer contact of measurement well shaft bottom, in this detection pipe 1, neighbouring described aperture position has the first sealing dividing plate
2, the tube wall of described detection pipe 1 seals dividing plate 2 with described first and described shaft bottom soil layer forms collection chamber；
Temperature Humidity Sensor 3, is arranged on described first and seals on dividing plate 2, be configured to detect described collection chamber
In temperature and humidity；Pressure transducer 4, is arranged on described first and seals on dividing plate 2, be configured to
Detect the pressure in described collection chamber；Circulation line 5, this circulation line 5 has and described collection chamber phase
Logical entrance and exit；And gas concentration analyzer 6 (such as, Analysis of Carbon Dioxide Concentration instrument), if
Put and connect with described circulation line 5 in described detection pipe 1, be configured to circulation pipe described in situ detection
The concentration of the gas to be measured (such as, carbon dioxide) in road 5.
" in situ detection " referred to herein refer to gas collecting point directly gas is measured or minute
Analyse rather than send the gas collected back to ground and measure or analyze, be so avoided that gas is defeated
Affected by environment during sending and measurement or analysis result can not be accurately reflected out locality
Situation, also is able to obtain measurement or analytical data in real time simultaneously.
By technique scheme, the bottommost of detection pipe has collection chamber, is be made up of sealing dividing plate
The closing space of individual certain volume, bottom-open, directly it is buckled on the soil layer fathomed, is formed and measure
The casing of concentration/flux.Utilizing different sensors, such as, temperature, humidity, pressure detecting probe can
With the gaseous state in detection collection chamber in real time.By the concentration difference on two different times, auxiliary temperature,
Pressure, the correction of humidity etc., in the case of collection chamber volume is certain, can be easy to calculate unit
The gas flux of time soil.As a example by carbon dioxide, wherein, the concentration of carbon dioxide can be by two
Carbonoxide concentration analyzer measures (such as, concentration of infrared carbon dioxide analyser).By deriving:
Flux computing formula is:
F=0.0053 (C2-C1)*P*H/(273+T)(t2-t1)
In formula: nominal altitude H is fixing value, after being also converted to collection chamber volume for the volume of pipeline
The total height of collection chamber, unit is rice.Flux F unit is mg/m2/hr.P is absolute pressure, unit
For Pa.C1、C2For the gas concentration lwevel corresponding to the different measuring time, unit is PPM (mg/L).
T is Celsius temperature.t1、t2For the different measuring time, unit is hr (hour).
In above-mentioned embodiment, in order to obtain the humidity data of gas in collection chamber, it is preferable that this mensuration
Device can also include that humidity sensor is (for example, it may be have the temperature of temperature and humidity detection simultaneously
Moisture probe), it is arranged on sealing dividing plate 2.
In the above-described embodiment, the gas in collection chamber enters circulation pipe by the entrance of circulation line 5
Road 5, after gas concentration analyzer 6, returns to collection chamber from the outlet of circulation line 5.In order to disappear
Except gas concentration lwevel is detected the impact caused by gas humidity, in embodiments can be at circulation line
The nearly arrival end of 5 arranges dehumidifier 7 (such as, membrane filtration dehumidifier).This dehumidifier 7, can be with convection current
It is dried through the gas dehumidification of this dehumidifier 7.Dehumidifier 7 can follow with described gas concentration analyzer 6
Endless tube road 5 is sequentially connected in series from the inlet to the outlet.
In embodiments, above-mentioned gas cyclic process may be relatively slower, and is unfavorable for the acquisition of data.
It is therefore preferred that air pump 8 (such as, plunger air pump) can be arranged in circulation line 5, by gas
Pump 8 delivers to gas concentration analyzer 6 after being sucked by the gas in collection chamber.In such embodiment,
Air pump 8 can be arranged in circulation line 5 between dehumidifier 7 and described gas concentration analyzer 6, gas
Pump 8 can extract the gas in collection chamber and the gas extracted is delivered to gas concentration analyzer 6.
Use air pump 8 can realize gas directed flow in circulation line 5.Will collection by air pump 8
Gas in air chamber is released, and by filtering, dehumidifying device 7, sends into gas concentration analyzer 6 detected gas
Concentration, then again returns to be formed in collection chamber a closed circulation.So can learn collection chamber in real time
Interior gas concentration to be measured.
During detection, airtight gas circuit circulation can cause the rising of gas temperature, airtight gas collection also can
Cause increasing of pressure.In order to ensure the reliability of device security and testing result, the present invention is realizing
While case method measures accurately, the detection probe utilizing temperature, pressure and humidity can be with real-time perception collection
Gaseous state in air chamber, after several measure end cycle, can be by being arranged on circulation line 5
On electromagnetic valve 9 can discharge collection chamber in the gas suppressed, thus update the gas in collection chamber.Make
Replication is possibly realized.
In this embodiment, the determinator that the present invention provides can also include being arranged at circulation line 5
In electromagnetic valve 9, this electromagnetic valve 9 can be worked as the pressure that pressure transducer 4 detects and be exceeded predetermined threshold
Shi Kaiqi is to lose heart, and the pressure that pressure transducer 4 detects after disappointing returns to when detection starts
Original state or invariable time close.Temperature, humidity and pressure in collection chamber all can be to determinator
Normal work impact, at embodiment, electromagnetic valve 9 can work as pressure transducer 4 and described temperature
At least one in pressure that humidity sensor 3 detects, temperature and humidity is opened when exceeding predetermined threshold
To lose heart, and pressure transducer 4 and Temperature Humidity Sensor 3 detect after disappointing pressure, temperature
Close time constant with moisture constant.
The on-off control of above-mentioned electromagnetic valve 9 can be controlled by pressure transducer 4, it is also possible to periodically controls
The switch of electromagnetic valve 9 processed.The pressure that any one control mode accumulates in can emitting collection chamber,
And the gas inside collection chamber is updated, in order to start the newest measurement.
The principle of the present invention can be briefly described as following (still as a example by the detection to carbon dioxide).?
Laying gas detecting tube in the measurement well of one desired depth, gas detecting tube foot directly contacts shaft bottom
Soil layer (the such as deep sub-surface in 200 meters of ground of distance), is opening bottom detection pipe, and the inside is suitable
Position is provided with sealing dividing plate, can form one and close sky between the sealing dividing plate in detection pipe to soil
Between as collection chamber, collect the carbon dioxide of effusion in soil, it is achieved the case method flux measurement of down-hole.Collection
Air pump can be had above air chamber to pass through tubule from collection chamber air-breathing, go analyser to be analyzed after drying,
Gas after analysis returns collection chamber, forms the circulation gas circuit of a fixed volume.Analyser can be with
Time measure gas concentration lwevel therein, according to The Ideal-Gas Equation PV=nRT
Wherein,
P pressure, unit pa
V volume, unit m3
N mole, units/kg/mol
R gas constant, 8.31J/ (mol.K)
T absolute temperature, unit is K,
I.e. can calculate the carbon dioxide flux in the set time.
In embodiments of the present invention, above-mentioned each sensor (such as, temperature humidity measuring probe, pressure
Power measuring probe) data and the data of Analysis of Carbon Dioxide Concentration instrument such as can pass through data acquisition
Device (such as sample circuit) is acquired.The analogue signal collected can be number by analog to digital conversion
Word signal.Determinator can be configured with controller or be connected with peripheral control unit or computer.Control
Device can be the hardware element that single-chip microcomputer, IC chip etc. have calculation processing power.Controller and
/ or computer can obtain data from data acquisition unit, data are carried out computing with realize to carbon dioxide
The calculating of flux.In embodiments, when the pressure that pressure measxurement probe detects exceedes predetermined threshold,
Controller and/or computer can suspend mensuration, and send control signals to electromagnetic valve and open to lose heart, with
And when pressure returns to detect original state, controller and/or computer can send control signals to electricity
Magnet valve is closed, and then restarts to perform mensuration.The exhaust action of air pump can be carried out by setting cycle
Can also control to carry out by controller and/or computer.
The technical scheme provided by the present invention, original temperature, pressure and the humidity before measurement is underground
Raw value at this, when starting to measure, electromagnetic valve 9 can be changed into sealing and circulating gas by release gas circuit
Road.At this moment, starting to measure the concentration of gas to be measured, the gas temperature of period, pressure all can push away in time
Move and slowly raise, after measurement, electromagnetic valve 9 can be switched to discharge the position of gas circuit, gas collection
Indoor gas will be discharged in well casing (or measuring well), is finally discharged in surface air.Work as gas collection
Indoor temperature, pressure all returns to after original state no longer changes, and electromagnetic valve 9 just can switch again
Measuring state to sealing and circulating gas circuit carries out secondary measurement.So circulation.
Present invention also offers the in-situ determination method of a kind of gas concentration, this assay method includes:
Excavation has the measurement well of desired depth；
In this measurement well, arrange that detection pipe to form collection chamber, wherein, this inspection in the bottom of this measurement well
Opening bottom test tube contacts with described measurement well shaft bottom soil layer, neighbouring described aperture position in this detection pipe
Having sealing dividing plate, the tube wall of described detection pipe and described sealing dividing plate and described shaft bottom soil layer are formed described
Collection chamber；And
The supplemental characteristic of the gas to be measured in collection chamber described in situ detection.
Fig. 2 is the original position case method assay method flow chart of the gas flux according to embodiment of the present invention.As
Shown in Fig. 2, another aspect of the present invention, additionally provide the original position case method mensuration side of a kind of gas flux
Method, including: S100, excavation (or boring) has the measurement well of desired depth；S102, at this measurement well
Middle layout detects pipe to form collection chamber, wherein, the opening bottom this detection pipe in the bottom of this measurement well
Contacting with described measurement well shaft bottom soil layer, in this detection pipe, neighbouring described aperture position has sealing dividing plate,
The tube wall of described detection pipe forms described collection chamber with described sealing dividing plate and described shaft bottom soil layer；S104,
The temperature of the gas in collection chamber described in situ detection, pressure and gas concentration data to be measured；And S106,
According to the temperature of gas in the described collection chamber that different time detects, pressure and gas concentration number to be measured
Gas flux to be measured according to the bottom calculating described measurement well.
Said method can be measured by the original position case method of the gas flux of foregoing description in operation instructions
Device realizes.
In embodiments, the assay method that embodiment of the present invention provides can also include: in detection institute
Before stating the temperature of gas in collection chamber, pressure and gas concentration data to be measured, in described collection chamber
Gas carry out removal moisture drying.
In embodiments, the assay method that embodiment of the present invention provides can also include: when being detected
To pressure exceed predetermined threshold time, discharge the gas in described collection chamber；And when described collection after release
Stop release when the pressure of the gas in air chamber is invariable, then proceed in collection chamber described in situ detection
The temperature of gas, pressure and dense carbon dioxide degrees of data.In a preferred embodiment, when being detected
To pressure, at least one in temperature and humidity exceed predetermined threshold time, discharge in described collection chamber
Gas；And when the pressure of gas in described collection chamber after release, temperature and humidity are stopped time invariable
Only release, then proceedes to the temperature of gas in collection chamber described in situ detection, pressure and gas to be measured dense
Degrees of data
For purposes such as testing result verifications, in embodiments, it is also possible to former on ground and underground respectively
The temperature of gas, pressure and gas concentration data to be measured in the detection collection chamber of position；And then ratio is over the ground
The detection data of face and underground.
The working environment of underground and ground working environment have a biggest difference, and test instrunment and equipment
Deng all there being its specific working condition, such as when temperature or humidity too low or too high time, some equipment is by nothing
Method normally starts or accurately completes to measure work, and the embodiment shown in Fig. 3 is precisely in order to solve this
Problem, it is ensured that each instrument or equipment also can normally work in underground.
Example arrangement below in conjunction with the Fig. 3 determinator to providing according to embodiment of the present invention is carried out
Explanation.When the embodiment shown in Fig. 3 is illustrated, comprise in the embodiment shown in Fig. 1
Same section may be omitted.As it is shown on figure 3, seal dividing plate 2 away from inspection first in detection pipe 1
The side of test tube 1 opening also has the second sealing dividing plate 18, and described second seals dividing plate 18 and described the
One inwall sealing dividing plate 2 and described detection pipe 1 surrounds closed space, Temperature Humidity Sensor 3, pressure
Force transducer 4, gas concentration analyzer 6 and dehumidifier 7 are in this closed space.Embodiment
In, seal dividing plate 18 by second and form two sealing spaces in down-hole, i.e. second seals dividing plate 18 arrives
Between ground, and the second sealing dividing plate 18 and the first sealing dividing plate 2.Second seals dividing plate 18 and the
One setting sealing dividing plate 2 makes therebetween various kinds of equipment and instrument by basic protection, it is to avoid
Occur that such as infiltration, microorganism intrusion, humidity are excessive etc. and affect equipment or situation that instrument normally works goes out
Existing.
Ventilation duct 11 runs through the second sealing dividing plate 18, makes closed space turn on earth's surface.Utilize ventilation duct
11, can carry, to closed space, the pure air being dried, in turn from the control chamber being arranged on ground
The air that conveying comes can also take away the heat in closed space and dampness, takes ground to along measuring well well casing
Release, it is to avoid overheated situation occurs in gas concentration analyzer 6.Have in practice been verified that, be placed in underground 10m
Time, ventilation duct 11 can be not provided with and ensure that instrument and equipment normally works.
Owing to down-hole exists the possibility of infiltration, in the present embodiment, being additionally provided with immersible pump 12, it is arranged
In collection chamber, collection chamber can also arrange water detection transmitter 13 (such as, hydrops detection simultaneously
Device).Water accumulation level in described collection chamber can be detected by water detection transmitter 13, immersible pump
12 can exist hydrops and water level reaches to open hydrops is discharged collection during predetermined altitude in collection chamber
Air chamber, such as, is discharged to ground by pumping for water pump pipe 24.In embodiments, hydrops can be passed through
Detection transmitter 13 realizes water level detecting, controls immersible pump 12 by ground control box and works, works as hydrops
Detection transmitter 13 detects when water level exceedes setting value, starts immersible pump 12, thus by collection chamber
Hydrops be discharged to earth's surface by drinking-water pipe 23.
In order to realize that gas concentration analyzer 6 is demarcated, it is provided through threeway in embodiments
The gas inlet pipe 15 that electromagnetic valve 22 is connected with the inlet end of gas concentration analyzer 6.Can be by arranging
Gas is squeezed into gas inlet pipe 15 and is demarcated by the pump on ground, and wherein, pump can be by ground control box
Control.
In embodiments, three ends of three-way magnetic valve 9 connect the inlet end of dehumidifier 7, circulation respectively
Pipeline 5 and ground survey sampling suction nozzle 19.Wherein, ground survey is made when three-way magnetic valve 9 action
When sampling suction nozzle 19 connects with circulation line 5, the gas in collection chamber can be sampled from ground survey
Suction nozzle 19 is sent to ground, to realize the ground survey of underground gas.Such as, ground survey is adopted
Sample suction nozzle 19 is connected with ground gas concentration analyzer, carries out ground surface sample suction-type and measures.
So by ground survey and underground survey, measurement data can not only be calibrated, it is also possible to such as
Ground checkout equipment is utilized uninterruptedly to detect during the detection equipment fault of underground.For example, it is possible to be set as
The gas concentration analyzer in shaft bottom, when non-measured pattern, opens ground gas concentration analyzer, and by two
The measurement result of person is compared, and reaches to verify the purpose of measurement result.Additionally, ground survey sampling is inhaled
Trachea 19 can also serve as and diffuse with pipe, can be sampled air-breathing by ground survey after carrying out one-shot measurement
Pipe 19 balances subsurface temperature, pressure and humidity.
For in order to be effective, the length of each pipeline used in above-mentioned embodiment should be carried out according to the detection degree of depth
Change, i.e. no matter in which kind of degree of depth detect, should ensure that ventilation duct 11, gas inlet pipe 15, water
Pumping water pipe 24, ground survey sampling suction nozzle 19 all can lead to ground.
Opening part bottom detection pipe 1 can be provided with gas collection dividing plate 14.This gas collection dividing plate 14 has many
Pore structure, multiple perforates of this loose structure supplied gas can be passed through to enter described collection chamber, the most both may be used
To allow gas (such as, carbon dioxide) to enter collection chamber from opening, it is prevented from again foreign body and enters collection
Air chamber.In a preferred embodiment, gas collection dividing plate 14 has and caves in collection chamber direction from opening
Shape, such as, taper.
In order to protect detection equipment and make testing result more accurate, the following of inlet end of dehumidifier 7
Particulate filter 16 can also be in series with, it is achieved to the filtration of molecule in gas on endless tube road.
In embodiments, non-tight installing plate 10 can be set in the appropriate location of the inside of detection pipe 1
With 17 to install or to arrange above-mentioned detecting element and pipeline.According to actual needs, such non-tight peace
Dress plate can be multiple.
In embodiments, the power supply of above-mentioned detecting element, electromagnetic valve and pump can be by the control on ground
Case is provided by feed cable.Correspondingly, the signal that detecting element etc. produce can be passed by signal cable
Deliver to the control chamber on ground.In order to ensure detect device can non-stop run, can be in the control on ground
Case arranges uninterrupted power source (ups power) to ensure power supply.
Furthermore, it is necessary to explanation, Fig. 3 gives composition that equipment is detailed for purpose of explanation.?
Ventilation duct 11, immersible pump 12, water detection transmitter 13, gas collection dividing plate 14, particle filtering in Fig. 3
Device 16 etc. can design for selectivity, can arrange according to concrete suitable environment, such as when measuring
When device is placed in underground 2000m, it is necessary to ventilation duct 11 is set to ensure that instrument can dispel the heat in time；Again
As when determinator being placed in aqueous abundant underground environment, it is necessary to arrange immersible pump 12, water detection
Transmitter 13 ensures and trouble free service.
Determinator can have multiple-working mode, such as, measurement pattern, calibration mode and dormancy
Pattern.Under each mode of operation, in determinator, the action of each assembly may be different.By table 1 to survey
Type and the function of determining electromagnetic valve in device are described.
Table 1
Mode of operation explanation (as a example by carbon dioxide is detected) of determinator citing:
1) measurement pattern.Shaft bottom gas analyzer for CO2 is started shooting when meeting measuring condition and is measured 1 time.
Measuring condition can have two kinds, a kind of returns to initial condition for the temperature in collection chamber, pressure and humidity；
Another kind of for timing start-up measurement.Need during Timing measurement to consider gas collection room pressure, temperature and humidity
Resume speed, the duration of timing is greater than the time of recovery.When measuring each time, gas analyzer for CO2 is opened
Beginning to be energized and preheat, preheat the predetermined time (such as 3min), then booster air pump measures, and measures
Reading storage after response time (such as 10s), by gas analyzer for CO2 and air pump after being measured
Power-off.
2) calibration mode.Manual operation Dietary behavior at the scene, this mould manually opened after gas is connected
Formula, demarcates and well cuts out afterwards.Under calibration mode, three-way magnetic valve 22,23 band electric-opening, switching pipe
Road (realizes gas to be divided by carbon dioxide from gas inlet pipe 15 to the state connecting gas the most in figure 3
It is discharged to measure the path of well well casing from the breather of dehumidifier 7 after analyzer 6), carboloy dioxide analysis
Manually by three-way magnetic valve 22,23 power-off after instrument mark is complete, three-way magnetic valve 22,23 is returned to again measure
The pipeline connection status of pattern.Based on this, three-way magnetic valve 22,23 is properly termed as demarcating electromagnetic valve,
And be all normally closed point, not timing signal not power consumption.
3) Sleep protection pattern.When ups power dump energy to set point, whole system can be closed
Closing and the valve of extraneous all import and exports, measurement pattern terminates, and system can utilize dump energy to tie up
Hold system security and reach more than 24 hours (meanwhile, preventing low temperature freezing, to prevent the generation of condensation),
Subsequently into Sleep protection state.Sleep protection pattern can manually and automatically enter and release.
The determinator provided by embodiment of the present invention and assay method, can monitor from ground until
Underground is more than the flux of the gas to be measured (such as, carbon dioxide) of more than 1,000 meters of depths.In collection chamber
Pressure and temp humidity detection is had to pop one's head in, it is convenient to the initial condition under perception stratum and duty, for
Apparatus system controls to provide foundation.As a example by carbon dioxide to be measured, determinator has dehumidifying device
The interference of steam can be removed, eliminate humidity and infrared method is measured the impact of gas concentration lwevel, survey
Determine precision high, reproducible.In-situ measuring method ensure that measurement is completely in original temperature, pressure humidity
Carry out under the conditions of Deng, and use high accuracy analysis instrument (error 1ppm) to measure, so for one
Individual small concentration change system can perceive observantly.Can significantly do sth. in advance to gas leakage pre-
Call time.
The preferred embodiment of the present invention is described in detail above in association with accompanying drawing, but, the present invention does not limit
Detail in above-mentioned embodiment, in the technology concept of the present invention, can be to the present invention
Technical scheme carry out multiple simple variant, these simple variant belong to protection scope of the present invention.Example
As, Analysis of Carbon Dioxide Concentration instrument is changed to carbon monoxide, methane or other gas concentration analyzers with reality
Now to carbonomonoxide concentration/flux, methane or the mensuration of other gas concentration/flux.
It is further to note that each the concrete technology described in above-mentioned detailed description of the invention is special
Levy, in the case of reconcilable, can be combined by any suitable means.In order to avoid need not
The repetition wanted, various possible compound modes are illustrated by the present invention the most separately.
Additionally, combination in any can also be carried out between the various different embodiment of the present invention, as long as its
Without prejudice to the thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (15)
1. the in-site detecting device of a gas parameter, it is characterised in that this determinator includes:
Detection pipe, is configured to be arranged in the measurement well with desired depth, opening bottom this detection pipe
Mouth contacts with described measurement well shaft bottom soil layer, and in this detection pipe, neighbouring described aperture position has the first sealing
Dividing plate, the tube wall of described detection pipe seals dividing plate with described first and described shaft bottom soil layer forms collection chamber；
And
Gas parameter analyser, is arranged in described detection pipe, is configured to collection chamber described in situ detection
In the special parameter of gas to be measured.
Determinator the most according to claim 1, it is characterised in that this determinator also includes:
Temperature Humidity Sensor, is arranged on described first and seals on dividing plate, be configured to detect in described collection chamber
Temperature and humidity；With
Pressure transducer, is arranged on described first and seals on dividing plate, be configured to detect in described collection chamber
Pressure.
Determinator the most according to claim 1 and 2, it is characterised in that this determinator is also
Including:
Circulation line, has the entrance and exit communicated with described collection chamber；With
Dehumidifier, is configured to the gas dehumidification to flowing through this dehumidifier and is dried, and described dehumidifier is with described
Gas parameter analyser is sequentially connected in series in described circulation line from the inlet to the outlet.
Determinator the most according to claim 3, it is characterised in that this determinator also includes:
Air pump, this air pump be arranged on dehumidifier described in described circulation line and described gas parameter analyser it
Between, it is configured to extract the gas in described collection chamber and the gas extracted is delivered to described gas ginseng
Number analyser.
Determinator the most according to claim 3, it is characterised in that this determinator also includes:
Electromagnetic valve, is arranged in described circulation line, is configured to when described pressure transducer and described temperature
At least one in pressure that humidity sensor detects, temperature and humidity open when exceeding predetermined threshold with
Lose heart, and described pressure transducer and described Temperature Humidity Sensor detect after disappointing pressure, temperature
Close when degree and moisture constant are constant.
Determinator the most according to claim 3, it is characterised in that described in this detection pipe inherence
First sealing dividing plate also has the second sealing dividing plate away from the side of described opening, and described second seals dividing plate
Seal dividing plate with described first and described detection inside pipe wall surrounds closed space, described temperature and humidity sensing
Device, described pressure transducer, described gas parameter analyser and described dehumidifier are in described Guan Bi sky
In between.
Determinator the most according to claim 6, it is characterised in that described determinator also wraps
Include and run through the described second ventilation duct sealing dividing plate, for by the conducting of described closing space and ground environment with
Ventilate.
Determinator the most according to claim 1, it is characterised in that described determinator also wraps
Including: be arranged on the immersible pump in described collection chamber and hydrops detector, described hydrops detector is configured to
Detecting the water accumulation level in described collection chamber, described immersible pump is configured to when in described collection chamber
Open hydrops to be discharged described collection chamber when water accumulation level reaches predetermined altitude.
Determinator the most according to claim 1, it is characterised in that bottom described detection pipe
Opening part is provided with gas collection dividing plate, and this gas collection dividing plate has multiple supplied gas by enter described collection chamber
Hole.
Determinator the most according to claim 1, it is characterised in that described determinator also wraps
Including ground surface sample suction nozzle, this ground surface sample suction nozzle connects with described collection chamber, can treat described
Survey gas and deliver to ground.
The in-situ determination method of 11. 1 kinds of gas parameters, it is characterised in that this assay method includes:
Excavation has the measurement well of desired depth；
In this measurement well, arrange that detection pipe to form collection chamber, wherein, this inspection in the bottom of this measurement well
Opening bottom test tube contacts with described measurement well shaft bottom soil layer, neighbouring described aperture position in this detection pipe
Having sealing dividing plate, the tube wall of described detection pipe and described sealing dividing plate and described shaft bottom soil layer are formed described
Collection chamber；And
The certain parameter data of the gas to be measured in collection chamber described in situ detection.
12. assay methods according to claim 11, it is characterised in that this assay method also wraps
Include: the temperature of the gas in collection chamber described in situ detection, humidity and pressure.
13. assay methods according to claim 12, it is characterised in that this assay method also wraps
Include:
Detect the special parameter number of the temperature of gas in described collection chamber, pressure and gas to be measured in position
According to before, the gas in described collection chamber is carried out removal moisture drying.
14. assay methods according to claim 12, it is characterised in that this assay method also wraps
Include:
When at least one in detected pressure, temperature and humidity exceedes predetermined threshold, discharge institute
State the gas in collection chamber；And
When the pressure of gas in described collection chamber after release, temperature and humidity stop releasing time invariable
Put, then proceed to the temperature of gas in collection chamber described in situ detection, pressure and the specific ginseng of gas to be measured
Number data.
15. assay methods according to claim 11, it is characterised in that this assay method also wraps
Include: detect the certain parameter data of the gas in described collection chamber respectively on ground and ground in-situ；And
The detection data of comparison ground and ground in-situ are to verify.
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| CN201410662734 | 2014-11-19 | ||
| CN2014106627346 | 2014-11-19 |
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| CN108871876A (en) * | 2018-03-27 | 2018-11-23 | 中国石油天然气股份有限公司 | For monitoring the gas production column of injection gas displacement well site aerated zone soil carbon dioxide flux |
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| CN109781943A (en) * | 2018-12-28 | 2019-05-21 | 中国农业大学 | Greenhouse gas emissions automatic detection device and system and method |
| CN111927429A (en) * | 2020-07-29 | 2020-11-13 | 北京理工大学 | Detection and early warning device and method for carbon dioxide stored in oil and gas field exploitation layer |
| CN112557629A (en) * | 2020-12-14 | 2021-03-26 | 中铁第一勘察设计院集团有限公司 | Soil gas flux measuring method |
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| CN108871876A (en) * | 2018-03-27 | 2018-11-23 | 中国石油天然气股份有限公司 | For monitoring the gas production column of injection gas displacement well site aerated zone soil carbon dioxide flux |
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| CN112557629B (en) * | 2020-12-14 | 2023-08-08 | 中铁第一勘察设计院集团有限公司 | Soil gas flux measuring method |
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Address after: 100011 Beijing Dongcheng District, West Binhe Road, No. 22 Patentee after: CHINA ENERGY INVESTMENT Corp.,Ltd. Patentee after: Beijing low carbon clean energy Research Institute Address before: 100011 Shenhua building, 22 West Binhe Road, Dongcheng District, Beijing Patentee before: SHENHUA GROUP Corp.,Ltd. Patentee before: NATIONAL INSTITUTE OF CLEAN-AND-LOW-CARBON ENERGY |