CN105974086A - Standard device and method for adjusting carbon dioxide flux and leakage and back-diffusion coefficients - Google Patents
Standard device and method for adjusting carbon dioxide flux and leakage and back-diffusion coefficients Download PDFInfo
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- CN105974086A CN105974086A CN201610275520.2A CN201610275520A CN105974086A CN 105974086 A CN105974086 A CN 105974086A CN 201610275520 A CN201610275520 A CN 201610275520A CN 105974086 A CN105974086 A CN 105974086A
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Abstract
A standard device and method for adjusting carbon dioxide flux and leakage and back-diffusion coefficients are provided; a gas outlet connector on a standard device panel is connected with a gas inlet of an adjustable micro pump; a gas outlet of the adjustable micro pump is connected with a gas inlet of a first flowmeter; a gas outlet of the first flowmeter is connected with a gas inlet of an adsorption tube; a gas outlet of the adsorption tube is connected with a gas inlet connector on the panel; an opening sample box covers the panel; a carbon dioxide gas source connector on the panel is connected with a gas outlet of a second flowmeter; a gas inlet of the second flowmeter is connected with a gas outlet of an adjusting valve; a gas inlet of the adjusting valve is connected with a gas outlet of a buffer container; a gas inlet of the buffer container is connected with a gas outlet of a heat exchanger; a gas inlet of the heat exchanger is connected with a gas outlet of a pressure reducing valve; a gas inlet of the pressure reducing valve is connected with a carbon dioxide gas source. The standard device for adjusting the carbon dioxide flux and the leakage and back-diffusion coefficients is capable of actively adjusting the carbon dioxide flux and the leakage and back-diffusion coefficients of the standard device.
Description
Technical field
The present invention relates to discharge into the atmosphere analogy method and device, particularly one of a kind of soil carbon dioxide can lead
Move any regulation of carbon dioxide flux and leakage and the standard set-up of back-diffusion coefficient and method.
Background technology
Greenhouse effect is the main cause of climate warming, and wherein carbon dioxide is most important greenhouse gases.Entirely
In fullerenes cyclic process, in soil, carbon dioxide is important form and the link of global carbon.The carbon dioxide flux of soil
As the important measure index on land with the exchange of atmosphere interface greenhouse gases, not only reflect soil physics, soil chemistry, soil
Biological property, also reflects the mankind and also may be used Land_use change, underground mineral resources, karst situation, the carbon dioxide flux of soil
For vegetation or the evaluation of soil fertility regeneration rate.Method and the instrument of measuring soil carbon dioxide flux have multiple, and existing two
Carbonoxide flux measurement process is as shown in Figure 1: is buckled in by the sales kit (SK) 1 in a lower ending opening and treats on test sample ground 4, due to soil
Carbon dioxide in earth is under diffusion with seepage effect, and effusion surface enters sales kit (SK) 1, causes dense carbon dioxide in sales kit (SK) 1
Degree change.Carbon dioxide in sales kit (SK) 1 is pumped in carbon dioxide meter device 2 with constant flow rate by pump 3 always, by measuring
In air-flow, gas concentration lwevel is back-calculated to obtain carbon dioxide flux.
The flow rate of pump 3 is relatively big, the gas concentration lwevel in carbon dioxide meter device 2 and the carbon dioxide in sales kit (SK) 1
Concentration is equal, and the gas concentration lwevel C in carbon dioxide meter device 2 is:
(1)
J is tested soil surface carbon dioxide flux；S is the floor space of sales kit (SK) 1；V is the spatial volume of sales kit (SK) 1；
Leadage coefficient for sales kit (SK) 1；For back-diffusion coefficient；T is the time collecting carbon dioxide.
The solution of formula (1) is:
C0For ambient carbon dioxide concentration, multiple measurement period measurements gas concentration lwevel change rule in the sales kit (SK) 1 obtained
Rule just can obtain carbon dioxide flux by linearly or nonlinearly matching.
Owing to soil carbon dioxide flux has a greater change with the epidemic disaster of environment and the change of air pressure, therefore, inspection
Measure the method for soil carbon dioxide flux and the accuracy of instrument and reliability, it is necessary to the epidemic disaster by environment is not gentle
The soil carbon dioxide flux standard set-up of buckling.Chinese patent literature discloses one " any regulation of carbon dioxide flux
With leakage and the method for back-diffusion coefficient and standard set-up (application number: 201510052723.0) ", this device uses multiple apertures
Opening and closing regulate leakage and back-diffusion coefficient, but in practice due to dust may blocking aperture, change and reveal and anti-expand
Dissipate coefficient.
Summary of the invention
It is an object of the invention to overcome the above-mentioned deficiency of prior art to provide one actively can arbitrarily regulate titanium dioxide
Carbon flux and leakage and the standard set-up of back-diffusion coefficient and method, these apparatus and method can be used in inspection and measure carbon dioxide
The accuracy of the instrumentation and testing method of flux and reliability.
The technical scheme is that regulation of carbon dioxide flux and leakage and the standard set-up of back-diffusion coefficient, including
Opening sample case, panel, adjustable micro pump, first-class gauge, adsorption tube, second gauge, regulation valve, buffer container, heat exchange
Device, air relief valve and carbon dioxide air source.
Described panel is provided with inlet suction port, air outlet adapter and carbon dioxide air source joint, carbon dioxide air source joint
Being between inlet suction port and air outlet adapter, panel is the surface plate using dense material to make, when opening sample case is held in
When carrying out carbon dioxide flux measuring on panel, the panel that dense material is made can stop the back-diffusion of carbon dioxide.
Described dense material is glass and rustless steel.
Described adsorption tube is equipped with the adsorbing material of energy absorbing carbon dioxide, and described adsorbing material is calcium hydroxide.
One end of air outlet adapter on panel is connected with the air inlet of adjustable micro pump by pipeline, going out of adjustable micro pump
QI KOU is connected with the air inlet of first-class gauge by pipeline, and the gas outlet of first-class gauge is by the air inlet of pipeline with adsorption tube
Mouthful connect, adsorption tube gas outlet be connected with the inlet suction port on panel by pipeline, opening sample case covers on panel, and
By inlet suction port, air outlet adapter and carbon dioxide air source splice housing in opening collection radon cover, the carbon dioxide air source on panel connects
Head is connected with the gas outlet of second gauge by pipeline, and the air inlet of second gauge is by the gas outlet of pipeline with regulation valve
Connecting, the air inlet of regulation valve is connected with the gas outlet of buffer container by pipeline, the air inlet of buffer container pass through pipeline and
The gas outlet of heat exchanger connects, and the air inlet of heat exchanger is connected with the gas outlet of air relief valve by pipeline, the air inlet of air relief valve
It is connected with carbon dioxide air source by pipeline.
The standard set-up using regulation of carbon dioxide flux and leakage and back-diffusion coefficient actively arbitrarily to regulate titanium dioxide
The process of Carbon flux, the leakage of standard set-up and back-diffusion coefficient is as follows:
Opening sample case is held on panel, it is ensured that No leakage between sales kit (SK) and plate contact face, is then turn on titanium dioxide
Carbon source of the gas, carrys out regulation of carbon dioxide flux by regulation valve.
The flow rate controlling adjustable micro pump regulates leakage and back-diffusion coefficient.Owing to opening sample case and panel form
Carbon dioxide in confined space cannot escape in ambient atmosphere by leakage and back-diffusion effect, can only be adjustable with air
Micro pump is drawn through first-class gauge and enters adsorption tube, the adsorbing material absorption that the carbon dioxide in air is adsorbed in pipe
After, the most carbonated air enters opening sample case, this makes it possible to be regulated by the flow rate controlling adjustable micro pump
Leakage and back-diffusion coefficient.
The further technical scheme of the present invention is: disconnected by the pipeline between first-class gauge and adsorption tube.
Opening sample case is held on panel, it is ensured that No leakage between sales kit (SK) and plate contact face, is then turn on two
Carbonoxide source of the gas, carrys out regulation of carbon dioxide flux by regulation valve.
Control the flow rate of adjustable micro pump and regulate leakage and back-diffusion coefficient, owing to opening sample case and panel form
Carbon dioxide in confined space cannot escape in ambient atmosphere by leakage and back-diffusion effect, can only be adjustable with air
Micro pump is drawn through first-class gauge and enters ambient atmosphere, and the carbon dioxide in the air of ambient atmosphere is adsorbed the suction in pipe
After enclosure material absorption, the most carbonated air enters opening sample case, this makes it possible to by controlling adjustable micro pump
Flow rate regulates leakage and back-diffusion coefficient.
The present invention compared with prior art has a characteristic that
Device and measuring method are simple, and carbon dioxide flux, leakage and back-diffusion coefficient can actively arbitrarily regulate.
Below in conjunction with the drawings and specific embodiments, the detailed construction of the present invention is further described.
Accompanying drawing explanation
Accompanying drawing 1 is existing carbon dioxide flux measuring device structural representation；
Regulation of carbon dioxide flux that accompanying drawing 2 provides for the present invention and the standard set-up structural representation of leakage and back-diffusion coefficient
Figure, in figure, first-class gauge is connected by pipeline with adsorption tube；
Regulation of carbon dioxide flux that accompanying drawing 3 provides for the present invention and the standard set-up structural representation of leakage and back-diffusion coefficient
Figure, in figure, first-class gauge disconnects with adsorption tube.
Detailed description of the invention
Embodiment one, regulation of carbon dioxide flux and leakage and the standard set-up of back-diffusion coefficient, including opening sample case
1, panel 5, adjustable micro pump 6, first-class gauge 7, adsorption tube 8, second gauge 9, regulation valve 10, buffer container 11, heat exchange
Device 12, air relief valve 13 and carbon dioxide air source 14.
Described panel 5 is provided with inlet suction port 5-1, air outlet adapter 5-2 and carbon dioxide air source joint 5-3, titanium dioxide
Carbon gas source connector 5-3 is between inlet suction port 5-1 and air outlet adapter 5-2, and panel 5 is the plane using dense material to make
Plate, when opening sample case 1 be held in carry out carbon dioxide flux measuring on panel 5 time, the panel 5 that dense material is made can hinder
The back-diffusion of gear carbon dioxide.
Described dense material is glass and rustless steel.
Described adsorption tube 8 is equipped with the adsorbing material of energy absorbing carbon dioxide, and described adsorbing material is calcium hydroxide.
One end of air outlet adapter 5-2 on panel 5 is connected with the air inlet of adjustable micro pump 6 by pipeline, adjustable trace
The gas outlet of pump 6 is connected with the air inlet of first-class gauge 7 by pipeline, and pipeline and suction are passed through in the gas outlet of first-class gauge 7
The air inlet of attached pipe 8 connects, adsorption tube 8 gas outlet be connected with the inlet suction port 5-1 on panel 5 by pipeline, opening sample
Product case 1 covers on panel 5, and inlet suction port 5-1, air outlet adapter 5-2 and carbon dioxide air source joint 5-3 are covered on opening collection radon
In cover 5, the carbon dioxide air source joint 5-3 on panel 5 is connected with the gas outlet of second gauge 9 by pipeline, second flow
The air inlet of meter 9 is connected by the gas outlet of pipeline with regulation valve 10, and the air inlet of regulation valve 10 is by pipeline and buffer container
The gas outlet of 11 connects, and the air inlet of buffer container 11 is connected with the gas outlet of heat exchanger 12 by pipeline, entering of heat exchanger 12
QI KOU is connected with the gas outlet of air relief valve 13 by pipeline, and the air inlet of air relief valve 13 is by pipeline with carbon dioxide air source 14 even
Connect.
The standard set-up using regulation of carbon dioxide flux and leakage and back-diffusion coefficient actively arbitrarily to regulate titanium dioxide
The process of Carbon flux, the leakage of standard set-up and back-diffusion coefficient is as follows:
Opening sample case 1 is held on panel 5, it is ensured that No leakage between sales kit (SK) 1 and panel 5 contact surface, is then turn on two
Carbonoxide source of the gas 14, carrys out regulation of carbon dioxide flux by regulation valve 10.
The flow rate controlling adjustable micro pump 6 regulates leakage and back-diffusion coefficient.Due to opening sample case 1 and panel 5 groups
Carbon dioxide in the confined space become cannot escape in ambient atmosphere by leakage and back-diffusion effect, can only be with air quilt
Adjustable micro pump 6 is drawn through first-class gauge 7 and enters adsorption tube 8, and the carbon dioxide in air is adsorbed the adsorption material in pipe 8
After material absorption, the most carbonated air enters opening sample case 1, this makes it possible to the stream by controlling adjustable micro pump 6
Rate regulates leakage and back-diffusion coefficient.
Embodiment two, regulation of carbon dioxide flux and leakage and the standard set-up of back-diffusion coefficient, reference embodiment one, with
Unlike embodiment one, the pipeline between first-class gauge 7 and adsorption tube 8 is disconnected.
The standard set-up using regulation of carbon dioxide flux and leakage and back-diffusion coefficient actively arbitrarily to regulate titanium dioxide
The process of Carbon flux, the leakage of standard set-up and back-diffusion coefficient is as follows:
Opening sample case 1 is held on panel 5, it is ensured that No leakage between sales kit (SK) 1 and panel 5 contact surface, is then turn on two
Carbonoxide source of the gas 14, carrys out regulation of carbon dioxide flux by regulation valve 10.
The process of regulation of carbon dioxide flux, the leakage of standard set-up and back-diffusion coefficient is as follows:
Control the flow rate of adjustable micro pump 6 and regulate leakage and back-diffusion coefficient, owing to opening sample case 1 and panel 5 form
Carbon dioxide in confined space cannot escape in ambient atmosphere by leakage and back-diffusion effect, can only be adjustable with air
Micro pump 6 is drawn through first-class gauge 7 and enters ambient atmosphere, and the carbon dioxide in the air of ambient atmosphere is adsorbed in pipe 8
Adsorbing material absorption after, the most carbonated air enter opening sample case 1, this makes it possible to by control adjustable trace
The flow rate of pump 6 regulates leakage and back-diffusion coefficient.
Claims (4)
1. regulation of carbon dioxide flux and leakage and the standard set-up of back-diffusion coefficient, is characterized in that: include opening sample case, face
Plate, adjustable micro pump, first-class gauge, adsorption tube, second gauge, regulation valve, buffer container, heat exchanger, air relief valve and two
Carbonoxide source of the gas；
Described panel is provided with inlet suction port, air outlet adapter and carbon dioxide air source joint, and carbon dioxide air source joint exists
Between inlet suction port and air outlet adapter, panel is the surface plate using dense material to make, when opening sample case is held in panel
On when carrying out carbon dioxide flux measuring, the panel that dense material is made can stop the back-diffusion of carbon dioxide；
Described dense material is glass and rustless steel；
Described adsorption tube is equipped with the adsorbing material of energy absorbing carbon dioxide, and described adsorbing material is calcium hydroxide；
One end of air outlet adapter on panel is connected with the air inlet of adjustable micro pump by pipeline, the gas outlet of adjustable micro pump
Being connected by the air inlet of pipeline with first-class gauge, the gas outlet of first-class gauge is connected by the air inlet of pipeline with adsorption tube
Connect, adsorption tube gas outlet be connected with the inlet suction port on panel by pipeline, opening sample case covers on panel, and will enter
Gas joint, air outlet adapter and carbon dioxide air source splice housing are in opening collection radon cover, and the carbon dioxide air source joint on panel leads to
Piping is connected with the gas outlet of second gauge, and the air inlet of second gauge is connected by the gas outlet of pipeline with regulation valve
Connecing, the air inlet of regulation valve is connected with the gas outlet of buffer container by pipeline, and the air inlet of buffer container passes through pipeline and changes
The gas outlet of hot device connects, and the air inlet of heat exchanger is connected with the gas outlet of air relief valve by pipeline, and the air inlet of air relief valve leads to
Piping is connected with carbon dioxide air source.
2. the standard set-up using regulation of carbon dioxide flux as claimed in claim 1 and leakage and back-diffusion coefficient comes actively
Arbitrarily regulation of carbon dioxide flux, the leakage of standard set-up and back-diffusion coefficient, is characterized in that:
Opening sample case is held on panel, it is ensured that No leakage between sales kit (SK) and plate contact face, is then turn on titanium dioxide
Carbon source of the gas, carrys out regulation of carbon dioxide flux by regulation valve；
Control the flow rate of adjustable micro pump and regulate leakage and back-diffusion coefficient, due to opening sample case and panel form airtight
Carbon dioxide in space cannot escape in ambient atmosphere by leakage and back-diffusion effect, can only be with air by adjustable trace
Pumped enters adsorption tube by first-class gauge, after the adsorbing material absorption that the carbon dioxide in air is adsorbed in pipe, no
Carbonated air enter opening sample case, this makes it possible to by control adjustable micro pump flow rate regulate leakage and
Back-diffusion coefficient.
3. regulation of carbon dioxide flux as claimed in claim 1 and leakage and the standard set-up of back-diffusion coefficient, is characterized in that:
Pipeline between first-class gauge and adsorption tube is disconnected.
4. the standard set-up using regulation of carbon dioxide flux as claimed in claim 3 and leakage and back-diffusion coefficient comes actively
Arbitrarily regulation of carbon dioxide flux, the leakage of standard set-up and back-diffusion coefficient, is characterized in that:
Opening sample case is held on panel, it is ensured that No leakage between sales kit (SK) and plate contact face, is then turn on titanium dioxide
Carbon source of the gas, carrys out regulation of carbon dioxide flux by regulation valve；
Control the flow rate of adjustable micro pump and regulate leakage and back-diffusion coefficient, due to opening sample case and panel form airtight
Carbon dioxide in space cannot escape in ambient atmosphere by leakage and back-diffusion effect, can only be with air by adjustable trace
Pumped enters ambient atmosphere by first-class gauge, and the carbon dioxide in the air of ambient atmosphere is adsorbed the adsorption material in pipe
After material absorption, the most carbonated air enters opening sample case, this makes it possible to the flow rate by controlling adjustable micro pump
Regulate leakage and back-diffusion coefficient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610275520.2A CN105974086B (en) | 2016-04-29 | 2016-04-29 | Regulation of carbon dioxide flux and leakage and the standard set-up and method of back-diffusion coefficient |
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| CN201610275520.2A CN105974086B (en) | 2016-04-29 | 2016-04-29 | Regulation of carbon dioxide flux and leakage and the standard set-up and method of back-diffusion coefficient |
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| CN105974086B CN105974086B (en) | 2018-01-16 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0611965A2 (en) * | 1990-03-09 | 1994-08-24 | Shimadzu Corporation | Carbon analyzer for both aqueous solutions and solid samples |
| JPH07333129A (en) * | 1994-06-03 | 1995-12-22 | Norin Suisansyo Hokuriku Nogyo Shikenjo | Gas flux measuring method and apparatus |
| JP4630092B2 (en) * | 2005-03-07 | 2011-02-09 | 財団法人電力中央研究所 | Forest CO2 flux measurement method |
| CN103487360A (en) * | 2013-09-26 | 2014-01-01 | 衡阳师范学院 | Method for quickly measuring radon exhalation rate in closed-loop manner |
| CN103499672A (en) * | 2013-10-16 | 2014-01-08 | 衡阳师范学院 | Method and device for optionally adjusting radon exhalation rate and effective decay constants |
| CN104678767A (en) * | 2015-02-02 | 2015-06-03 | 衡阳师范学院 | Method for randomly adjusting carbon dioxide flux and leakage and back-diffusion coefficients and standard device |
| CN105182398A (en) * | 2015-09-30 | 2015-12-23 | 衡阳师范学院 | Quick radon exhalation rate measurement method using integral for closed loop part of electrostatic collection method |
-
2016
- 2016-04-29 CN CN201610275520.2A patent/CN105974086B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0611965A2 (en) * | 1990-03-09 | 1994-08-24 | Shimadzu Corporation | Carbon analyzer for both aqueous solutions and solid samples |
| JPH07333129A (en) * | 1994-06-03 | 1995-12-22 | Norin Suisansyo Hokuriku Nogyo Shikenjo | Gas flux measuring method and apparatus |
| JP4630092B2 (en) * | 2005-03-07 | 2011-02-09 | 財団法人電力中央研究所 | Forest CO2 flux measurement method |
| CN103487360A (en) * | 2013-09-26 | 2014-01-01 | 衡阳师范学院 | Method for quickly measuring radon exhalation rate in closed-loop manner |
| CN103499672A (en) * | 2013-10-16 | 2014-01-08 | 衡阳师范学院 | Method and device for optionally adjusting radon exhalation rate and effective decay constants |
| CN104678767A (en) * | 2015-02-02 | 2015-06-03 | 衡阳师范学院 | Method for randomly adjusting carbon dioxide flux and leakage and back-diffusion coefficients and standard device |
| CN105182398A (en) * | 2015-09-30 | 2015-12-23 | 衡阳师范学院 | Quick radon exhalation rate measurement method using integral for closed loop part of electrostatic collection method |
Non-Patent Citations (1)
| Title |
|---|
| 谭延亮等: "氡析出率测量过程中抽气采集容器内氡运移的数值研究", 《核电子学与探测技术》 * |
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