CN108896355A - A kind of gas sampling device and method - Google Patents
A kind of gas sampling device and method Download PDFInfo
- Publication number
- CN108896355A CN108896355A CN201810855725.7A CN201810855725A CN108896355A CN 108896355 A CN108896355 A CN 108896355A CN 201810855725 A CN201810855725 A CN 201810855725A CN 108896355 A CN108896355 A CN 108896355A
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- sampling
- vacuum
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- airbag
- valve
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- 238000005070 sampling Methods 0.000 title claims abstract description 79
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000007789 gas Substances 0.000 description 33
- 230000000052 comparative effect Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000006073 displacement reaction Methods 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011017 operating method Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000003556 assay Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 238000011549 displacement method Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000004817 gas chromatography Methods 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/24—Suction devices
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a kind of gas sampling device and methods, using the gas sampling device of the sampling container with multiple valve positions and vacuum evacuation device, it is sampled again after carrying out one or many " displacements-vacuum suction " operation, sampling container wherein with multiple valve positions can be the sampling airbag with bivalve or triple valve, sampling bladders or sampling bottle, vacuum evacuation device vacuum degree can reach 0.01MPa or more, and vacuum evacuation device can be portable vacuum diaphragm pump or vacuum suction bucket；The component for the device that the present invention selects is relatively common, cheap, be easily assembled to, and is convenient for carrying, and sampling method is simple, strong operability, does not need complicated skill, and samples accuracy height, and sample is close to gas source component.
Description
Technical field
The present invention relates to assay fields, and in particular to a kind of gas sampling device and method.
Background technique
Gas sampling technique is widely used in the fields such as petroleum, chemical industry, mining, environmental protection, electric power.Because the gas at scene has
When inconvenience on-line analysis, so usually to gas source sample, be temporarily stored in sampling container, then take to analysis instrument analysis.
Have plenty of from pressure sources such as pipeline with pressure, Pressure Vessels and carry out gas sample, some is then from normal pressure or subnormal ambient source sampling.
Sample tap is usually arranged in the former, and sampling airbag, sampling bladders, sampling bottle, syringe are entered in the case where the pressure of pipeline, container pushes
In equal sampling containers；The latter is usually pumped gas extraction with gas sample into sampling container.Gas source sample tap can be fixation
(being common in pressure source sampling) be also possible to mobile (being common in environment source sampling), and sampling container is then usually removable
It unloads, be moved easily and recycle.
During sample tap is connect with sampling container, due to sampling airbag, sampling bladders, syringe, sampling bottle etc.
Sampling container is simultaneously antivacuum, and the pipeline of connection is also not vacuum, inside gas residue when having air and preceding primary sample.
In order to guarantee the accuracy and safety of sampling, need to be displaced original residual gas with new gas to be sampled.Displacement
Effect and time swap generally at logarithmic relationship, cause the replacement result in later period not as good as early period.The displacement method being usually taken can
Can replacement result cannot reach it is expected thus sampling accuracy it is not high, perhaps displaced overlong time influences efficiency or samples
Device it is very expensive, or to the sampling skill of sampling operation personnel require height cause the sampling result difference of different personnel compared with
Greatly.
Summary of the invention
Replacement operator in conjunction with vacuum suction process, is broken displacement by the shortcomings that in order to overcome the prior art, the present invention
The logarithmic relationship of effect and time swap, and it is an object of the present invention to provide it is a kind of rapidly and efficiently, simple and convenient, accuracy is high, cheap
Gas sampling device and method.
In order to achieve the above object, the present invention adopts the following technical scheme that：
A kind of gas sampling method, using the gas sample for including the more valve positions sampling container and vacuum evacuation device that are connected
Device after connecting sampling container, samples again after carrying out one or many " displacements-vacuum suction " operation.
The gas sampling device for realizing the gas sampling method including the more valve positions sampling container being connected and vacuumizes
Device, more valve positions sampling container are the sampling airbag, sampling bladders or sampling bottle of two valves of band or a triple valve.
The vacuum evacuation device, it is preferable that vacuum degree can reach 0.01MPa or more.
The vacuum evacuation device, it is preferable that be portable vacuum diaphragm pump or vacuum suction bucket.
The beneficial effects of the invention are as follows：
The component of device selected by the present invention is relatively common, cheap, be easily assembled to, and is convenient for carrying, sampling method
Simply, strong operability, do not need complicated skill, and sample accuracy height, sample is close to gas source component.
Detailed description of the invention
Fig. 1 is the apparatus structure schematic diagram of the embodiment of the present invention 1.
Fig. 2 is the apparatus structure schematic diagram of the embodiment of the present invention 2.
Specific embodiment
In order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, below it is right
A specific embodiment of the invention is described further, but is not therefore limited the scope of protection of the present invention.
Embodiment 1：
As shown in Figure 1, being the gas sampling device of the embodiment of the present invention 1, which is that the sampling of more valve positions is held
Device, that is, bivalve samples airbag 1, vacuum evacuation device, that is, portable oil-free diaphragm vacuum pump 2.
Wherein, bivalve sampling airbag 1 has two valves of independent control, i.e. airbag intake valve 1-1 and airbag exhaust valve 1-
2；Portable oilless vacuum diaphragm pump 2 has pump steam inlet 2-1, pump exhaust inlet 2-2 and switch pump 2-3, and vacuum degree is by portable
The vacuum meter of formula oil-free diaphragm vacuum pump 2 indicates that vacuum degree is greater than 0.01MPa；Gas source sample tap and airbag intake valve 1-1 are controlled
Air inlet by sample tap connecting line 3-1 connection, the exhaust outlet that airbag exhaust valve 1-2 is controlled passes through with pump steam inlet 2-1
Connecting line 3-2 connection is pumped, pump exhaust inlet 2-2 is connect with exhaust gas processing device by tail gas connecting line 3-3, when tail gas is not necessarily to
When processing, tail gas connecting line 3-3 can be omitted；Hose, steel pipe, copper pipe etc. can be selected in connecting line, and connection dot encapsulation prevents from letting out
Leakage；Connection, airbag exhaust valve 1-2 and the connection for pumping connecting line 3-2 of airbag intake valve 1-1 and sample tap connecting line 3-1
It is designed as quickly connecting.
Operating procedure is as follows：
Step 1 connects sampling container：Sample tap connecting line 3-1 is connect with airbag intake valve 1-1, by airbag exhaust valve
1-2 is connect with pump connecting line 3-2；
Step 2 displacement：Airbag exhaust valve 1-2 is closed, airbag intake valve 1-1, pass when bivalve sampling airbag 1 will be filled with are opened
Hold one's breath a bag intake valve 1-1；
Step 3 vacuum suction：Airbag exhaust valve 1-2 is opened, switch pump 2-3 is opened and is evacuated, when portable nothing
Oily vacuum diaphragm pump 2 indicates when vacuum degree reaches 0.01MPa or more preferably, when reaching 0.09MPa, closes switch pump 2-3；
Step 4：Step 2 and step 3 carry out more than once preferably, carrying out 3 times, i.e., " displacement-vacuum suction-displacement-is true
Empty pump gas-displacement-vacuum suction "；
Step 5 disconnects sampling container connection：Step 2 replacement operator is carried out again, closes gas source sample tap, disconnects sampling
The connection of mouth connecting line 3-1 and airbag intake valve 1-1 disconnect airbag exhaust valve 1-2 and connect with pump connecting line 3-2.
Comparative example 1：
Gas source sample tap is connect with bivalve sampling airbag, opens airbag air inlet；When airbag will be filled with, airbag row is opened
Port；Continuous ventilation displacement 3 minutes.
Comparative example 2：
Single valve sampling airbag is vacuumized in advance, gas source sample tap is connect with single valve sampling airbag, opens airbag valve, gas
Airbag valve is closed when bag will be filled with.
The effect of embodiment 1：
In order to investigate the effect of embodiment 1, it is 10.00% propylene, Balance Air 90.0% that gas source, which selects molar concentration,
Helium, using gas chromatography respectively to embodiment 1, comparative example 1, comparative example 2 analyze, be with the result that gas source is directly analyzed
Standard carries out error calculation, and each embodiment carries out 10 sub-samplings, makes even to 10 sub-sampling operating times and chromatography result
, the effect of embodiment 1 is as shown in table 1.
The effect of 1 embodiment 1 of table
It can be seen that the error of embodiment 1 is minimum, the maximum comparative example 2 of operating time ratio error is slightly higher, and is far smaller than
Comparative example 1.
Embodiment 2：
As shown in Fig. 2, being the gas sampling device of the embodiment of the present invention 2, which is that the sampling of more valve positions is held
Device and vacuum evacuation device are constituted, and more valve positions sampling container includes that sampling bladders 4-1 and triple valve 4-2, vacuum means are set to vacuum
It is evacuated bucket 5.
Wherein, sampling bladders 4-1 connected with the c of triple valve 4-2 mouth by bladders connecting tube 4-3, bladders connecting tube 4-3 and
It samples bladders 4-1 and uses quick connection type.The a mouth of gas source sample tap and triple valve 4-2 are connected by sample tap connecting tube 6-1
It connects.Vacuum suction bucket 5 is connect with the b of triple valve 4-2 mouth by vacuum barrel connecting tube 6-2.Hose, steel can be selected in connecting line
Pipe, copper pipe etc., tie point sealing against leakage.When triple valve 4-2 is switched to valve position a, a mouthfuls are connected to c mouthfuls；Triple valve 4-2 is cut
When changing to valve position b, b mouthfuls are connected to c mouthfuls；When triple valve 4-2 is switched to closing valve position, a mouthfuls, b mouthfuls, c mouthfuls are not connected to.
Operating procedure is as follows：
Step 1 connects sampling container：Bladders connecting tube 4-3 is connect with sampling bladders 4-1；
Step 2 displacement：Triple valve 4-2 is switched to valve position a, and when sampling bladders 4-1 will be filled with, triple valve 4-2 is switched to pass
Valve closing position；
Step 3 vacuum suction：Triple valve 4-2 is switched to valve position b, opens 5 couples of sampling bladders 4-1 of vacuum suction bucket and carries out very
Empty pump gas stops using vacuum suction bucket 5, and triple valve 4-2 is switched to closing when vacuum degree reaches 0.01MPa or more
Valve position；
Step 4：Step 2 and step 3 carry out more than once preferably, carrying out 3 times, i.e., " displacement-vacuum suction-displacement-is true
Empty pump gas-displacement-vacuum suction ".
Step 5 disconnects sampling container connection：Step 2 replacement operator is carried out again, disconnects bladders connecting tube 4-3 and sampling
Bladders 4-1 connection.
Claims (4)
1. a kind of gas sampling method, which is characterized in that using more valve positions sampling container and vacuum evacuation device including being connected
Gas sampling device, connect sampling container after, carry out one or many " displacements-vacuum suction " operation after sample again.
2. realizing the gas sampling device of gas sampling method described in claim 1, which is characterized in that including the more valves being connected
Position sampling container and vacuum evacuation device, more valve positions sampling container are the sampling airbag of two valves of band or a triple valve, adopt
Sample bladders or sampling bottle.
3. gas sampling device according to claim 2, which is characterized in that the vacuum degree of the vacuum evacuation device reaches
0.01MPa or more.
4. gas sampling device according to claim 2, which is characterized in that it is true that the vacuum means are set to portable diaphragm
Sky pump or vacuum suction bucket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810855725.7A CN108896355A (en) | 2018-07-31 | 2018-07-31 | A kind of gas sampling device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810855725.7A CN108896355A (en) | 2018-07-31 | 2018-07-31 | A kind of gas sampling device and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108896355A true CN108896355A (en) | 2018-11-27 |
Family
ID=64352796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810855725.7A Pending CN108896355A (en) | 2018-07-31 | 2018-07-31 | A kind of gas sampling device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108896355A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109470417A (en) * | 2019-01-09 | 2019-03-15 | 青岛泰斯迈仪器设备有限公司 | A kind of leak hunting method of vacuum sample normal pressure detection |
| CN109738240A (en) * | 2019-03-07 | 2019-05-10 | 常州进出口工业及消费品安全检测中心 | A kind of device for formulating and its configuration method for hazardous gas quantitative detection |
| CN113431930A (en) * | 2021-06-30 | 2021-09-24 | 蜂巢能源科技有限公司 | Multi-way valve and collection device with same |
| CN113804518A (en) * | 2021-09-28 | 2021-12-17 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | High-purity and ultra-pure gas high-fidelity sampling device and method |
| CN114062056A (en) * | 2021-10-09 | 2022-02-18 | 中核核电运行管理有限公司 | Sampling device suitable for negative pressure and malleation gas pipeline |
| CN114081246A (en) * | 2021-11-19 | 2022-02-25 | 郭旭海 | Air acquisition bracelet |
-
2018
- 2018-07-31 CN CN201810855725.7A patent/CN108896355A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109470417A (en) * | 2019-01-09 | 2019-03-15 | 青岛泰斯迈仪器设备有限公司 | A kind of leak hunting method of vacuum sample normal pressure detection |
| CN109470417B (en) * | 2019-01-09 | 2020-07-07 | 青岛泰斯迈仪器设备有限公司 | Leak detection method for vacuum sampling normal pressure detection |
| CN109738240A (en) * | 2019-03-07 | 2019-05-10 | 常州进出口工业及消费品安全检测中心 | A kind of device for formulating and its configuration method for hazardous gas quantitative detection |
| CN109738240B (en) * | 2019-03-07 | 2024-05-03 | 常州工业及消费品检验有限公司 | Preparation device for quantitative detection of dangerous gas and preparation method thereof |
| CN113431930A (en) * | 2021-06-30 | 2021-09-24 | 蜂巢能源科技有限公司 | Multi-way valve and collection device with same |
| CN113431930B (en) * | 2021-06-30 | 2023-05-23 | 蜂巢能源科技有限公司 | Multi-way valve and collection device with same |
| CN113804518A (en) * | 2021-09-28 | 2021-12-17 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | High-purity and ultra-pure gas high-fidelity sampling device and method |
| CN113804518B (en) * | 2021-09-28 | 2024-04-16 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | High-purity and ultra-purity gas high-fidelity sampling device and method |
| CN114062056A (en) * | 2021-10-09 | 2022-02-18 | 中核核电运行管理有限公司 | Sampling device suitable for negative pressure and malleation gas pipeline |
| CN114062056B (en) * | 2021-10-09 | 2024-03-19 | 中核核电运行管理有限公司 | Sampling device suitable for negative pressure and positive pressure gas pipeline |
| CN114081246A (en) * | 2021-11-19 | 2022-02-25 | 郭旭海 | Air acquisition bracelet |
| CN114081246B (en) * | 2021-11-19 | 2024-04-26 | 广东汉卫检测科技有限公司 | Air collection bracelet |
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Application publication date: 20181127 |
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