CN107315078A - Cryogenic natural gas concentration detection apparatus - Google Patents
Cryogenic natural gas concentration detection apparatus Download PDFInfo
- Publication number
- CN107315078A CN107315078A CN201610408590.0A CN201610408590A CN107315078A CN 107315078 A CN107315078 A CN 107315078A CN 201610408590 A CN201610408590 A CN 201610408590A CN 107315078 A CN107315078 A CN 107315078A
- Authority
- CN
- China
- Prior art keywords
- analyzer
- natural gas
- detection apparatus
- cryogenic natural
- gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 130
- 239000003345 natural gas Substances 0.000 title claims abstract description 29
- 238000001514 detection method Methods 0.000 title claims abstract description 20
- 239000007789 gas Substances 0.000 claims abstract description 46
- 238000005070 sampling Methods 0.000 claims abstract description 28
- 230000005540 biological transmission Effects 0.000 claims abstract description 11
- 238000007405 data analysis Methods 0.000 claims abstract description 10
- 238000012360 testing method Methods 0.000 claims abstract description 8
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 30
- 229910052757 nitrogen Inorganic materials 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 3
- 239000004809 Teflon Substances 0.000 claims description 2
- 229920006362 Teflon® Polymers 0.000 claims description 2
- 239000003949 liquefied natural gas Substances 0.000 description 13
- 238000009792 diffusion process Methods 0.000 description 6
- 238000004458 analytical method Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 150000001335 aliphatic alkanes Chemical class 0.000 description 3
- 230000005764 inhibitory process Effects 0.000 description 3
- 238000009834 vaporization Methods 0.000 description 3
- 230000008016 vaporization Effects 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000009967 tasteless effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/22—Fuels; Explosives
- G01N33/225—Gaseous fuels, e.g. natural gas
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Medicinal Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Chemical & Material Sciences (AREA)
- Food Science & Technology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (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 present invention relates to a kind of cryogenic natural gas concentration detection apparatus, the problem of mainly solving to there is no cryogenic natural gas concentration detection apparatus in the prior art.The present invention is by using a kind of cryogenic natural gas concentration detection apparatus, including sampling unit, guidance unit and data analysis and transmission unit, sampling unit includes upsampling filter, sampling pipe, triple valve and flowmeter, guidance unit includes pressure maintaining valve, core modular components, the sampling mouth of pipe, upsampling filter, triple valve, flowmeter, methane concentration analyzer is sequentially connected with analyzer component, methane concentration analyzer is connected with data analysis with transmission unit respectively with analyzer component, core modular components are connected, and core modular components also with voltage stabilizing valve outlet, gas vent line is connected, the data analysis technical scheme including methane concentration analyzer and analyzer component that is connected with transmission unit preferably solves above mentioned problem, available in cryogenic natural gas Concentration Testing.
Description
Technical field
The present invention relates to a kind of cryogenic natural gas concentration detection apparatus.
Background technology
Liquefied natural gas (LNG) is that natural gas is purified, compresses, is cooled to the liquid become after its boiling temperature (- 162 DEG C)
Body.As a kind of energy of cleaning, liquefied natural gas is colourless, tasteless, nontoxic and non-corrosiveness, and its volume is about same amount gaseous state day
The 1/600 of right air volume.Based on China huge energy breach and environmental protection pressure, in recent years, liquefied natural gas industry is in China
Developed rapidly, many liquefaction plants, LNG gas stations, receiving stations etc. have built up and come into operation.
LNG has ultralow temperature and inflammable and explosive dual hazard property, because LNG temperature is extremely low (- 162 DEG C), gas-liquid expansion
Than big, LNG, once leaking, a large amount of low temperature methane gas can be volatilized immediately and air forms explosivity during storage
Mixture, runs into incendiary source and occurs serious fire explosion.Therefore, to after leakage LNG need take measures suppress its enter one
Step diffusion, reduces evaporation rate, it is to avoid cause more serious secondary disaster.Liquefied natural gas main component is methane, is being carried out
In the research process that liquefied natural gas diffusion suppresses, in order to study inhibition, it is necessary to the low temperature first of natural gas vaporization
Alkane gas concentration is detected.Therefore, design is a kind of can to detect the experimental provision of low temperature concentration of methane gas.
It is general to be sampled using pump suction type and diffusion type at present when detecting Methane in Air concentration, diffusion type sampling
The natural gas of 0-10%LEL concentration ranges can only be measured.Natural gas for measuring 0-100v% concentration ranges, typically using pump
Suction.But the detection mode for using pump suction type to be evacuated has very high requirement to the explosion-proof performance of instrument, pump suction type methane in addition
Concentration detector is generally portable instrument, is not suitable for being placed in the environment of low temperature, can not also work for a long time.
Low temperature concentration of methane gas device of the present invention is mainly used in methane concentration during natural gas vaporization diffusion
(0-100v%) is monitored in real time.It can also be used for the Concentration Testing of other low temperature or normal temperature fuel gas.
Currently without the Patents being related in terms of cryogenic natural gas concentration detection apparatus.
The content of the invention
The technical problems to be solved by the invention are the problem of there is no cryogenic natural gas concentration detection apparatus in the prior art,
A kind of new cryogenic natural gas concentration detection apparatus is provided.The device has available for excellent in cryogenic natural gas Concentration Testing
Point.
To solve the above problems, the technical solution adopted by the present invention is as follows：A kind of cryogenic natural gas concentration detection apparatus, bag
Sampling unit, guidance unit and data analysis and transmission unit are included, sampling unit includes upsampling filter, sampling pipe, triple valve
And flowmeter, guidance unit include pressure maintaining valve, core modular components, sampling the mouth of pipe, upsampling filter, triple valve, flowmeter, first
Alkane concentration analyzer is sequentially connected with analyzer component, and methane concentration analyzer is with analyzer component respectively with data analysis with passing
Defeated unit is connected, core modular components are connected, and core modular components are also connected with voltage stabilizing valve outlet, gas vent line, number
It is connected according to analysis with transmission unit including methane concentration analyzer and analyzer component, the data of generation pass through 4-20mA's respectively
Signal output is given to host computer.
In above-mentioned technical proposal, it is preferable that tested gas is flowed through via the filter of sampling head is directed list after sampling pipe
Member brings analyzer into.
In above-mentioned technical proposal, it is preferable that sampling pipe is Teflon material, and triple valve, which can connect sample gas, is used for first
The demarcation of alkane concentration analyzer.
In above-mentioned technical proposal, it is preferable that core modular components are to be based on venturi principle, utilize nitrogen or the stream of air
Measure the negative pressure produced and testing sample gas be drawn to methane concentration analyzer, after sample gas measure concentration through analyzer and
Nitrogen or air are discharged into air together.
In above-mentioned technical proposal, it is preferable that each core modular components has 3 interfaces, one of interface difference
It is connected with the outlet side of analyzer, one in 2 interfaces connects the nitrogen discharged via isocon external member and connect respectively in addition
Mouthful, remaining interface is respectively connected to gas exhaust piping.
In above-mentioned technical proposal, it is preferable that methane concentration analyzer selects the analysis of 0-100v% (volume fraction) range
Instrument, can realize real-time online measuring；Described device sets at least a set of sampling unit.
The technical problems to be solved by the invention are to devise one kind to detect cryogenic natural gas concentration (0-100v%)
Experimental provision, the low temperature concentration of methane gas that can be come out by the device to natural gas vaporization detects, specifically
The evaporation and diffusion Inhibition test of liquefied natural gas is can be applied to, is studied by detecting the change of methane concentration to liquefied natural gas
Inhibition, can be used for other low temperature of real-time online measuring or normal temperature hydrocarbon gas concentration, achieve preferable technology
Effect.
Brief description of the drawings
Fig. 1 cryogenic natural gas concentration detection apparatus schematic diagrames.
In Fig. 1, the 1 sampling mouth of pipe, 2 upsampling filters, 3 triple valves, 4 flowmeters, 5 methane concentration analyzers and analyzer group
Part, 6 core modular components, 7 nitrogen or air, 8 pressure maintaining valves, 9 sample gases, 10 gas vent lines；11 data analyses are with passing
It is defeated.
Below by embodiment, the invention will be further elaborated, but is not limited only to the present embodiment.
Embodiment
【Embodiment 1】
The present invention proposes a kind of device detected applied to low temperature concentration of methane gas, as shown in figure 1, its technical scheme
It is as follows：
(1) low temperature concentration of methane gas detection means of the present invention includes three units：Sampling unit, guidance unit and
On-line analysis and data transmission unit.
(2) low temperature methane sampling unit of the present invention includes upsampling filter, sampling pipe, the portion such as triple valve and flowmeter
It is grouped into；Tested gas is flowed through via the filter of sampling head to be directed unit and brings analyzer into after sampling pipe.Sampling pipe is spy
Fluorine dragon material.Triple valve, which can connect sample gas, is used for the demarcation of methane concentration analyzer.
According to the length of sampling pipe and the temperature range of gas concentration analyzer requirement, to avoid cryogenic gas from entering concentration
Analyzer damages equipment, it is contemplated that set heating apparatus.
(3) nitrogen or air guidance unit of the present invention includes guiding pressure maintaining valve, core modular components, shunting pipe sleeve
Part, gas extraction system and nitrogen cylinder group or air-compressor set into；Guiding core modular components therein are to be based on venturi principle, profit
Testing sample gas is drawn to methane concentration analyzer by the negative pressure produced with the flow of nitrogen or air, and sample gas is through analysis
Instrument has measured and has been discharged into air together with nitrogen or air after concentration；
Guiding gas is provided by nitrogen cylinder group, if concentration analyzer is antiknock device, the sky that can also be provided with air compressor machine
Gas is used as guiding gas.
Each guiding core modular components of the system have 3 interfaces.One of interface goes out with analyzer respectively
Gas end is connected, and one in 2 interfaces connects the nitrogen interface discharged via isocon external member, remaining interface respectively in addition
It is respectively connected to gas exhaust piping.
(4) data analysis of the present invention includes methane concentration analyzer and analyzer component with transmission unit.Methane is dense
The analyzer that analyzer selects 0-100v% ranges is spent, real-time online measuring can be realized；
In-line analyzer and data transmission unit main function are being collected in each position of front end via sampling unit
The gas come over by analyzer detect after generate some groups of data respectively, the data of generation are defeated by 4-20mA signal respectively again
Go out to be given to host computer.
(5) device of the present invention can set a pipeline to realize the methane concentration measurement of a point, may also set up many
Realize that multiple spot methane concentration is measured with pipeline.
(6)CH4The upper end of instrument cabinet is arranged on Deng combustible gas leak alarm instrument, to ensure analyzer in experimentation
The safety on periphery.
(7) according to the model and function of gas analyzer, device of the present invention can also be used for the dense of other hydrocarbon gas
Degree detection.
Specific measuring method is as follows：
The nitrogen or air 7 that nitrogen cylinder group or air engine are produced enter guidance unit after decompression by the voltage stabilizing of pressure maintaining valve 8
Core modular components 6, gas is flowed after the negative pressure produced filters under test gas 1 by gas piping filter 2 through triple valve
3rd, flowmeter 4 enters methane concentration analyzer 5, methane concentration analyzer 5 measure after methane concentration data are uploaded to it is upper
Machine, the gas after measurement is discharged into air with guiding gas.
【Comparative example】
It is pump suction type device to put forward measurement apparatus corresponding with the present invention, if measuring natural gas using pump suction type device
Concentration for this patent with respect to having significant limitation.First, pump suction type is unable to direct measurement cryogenic natural gas concentration, it is impossible to
Applied to the low temperature environment described in patent of the present invention, otherwise equipment can be caused damage.Second, because natural gas is combustible gas
Body, pump suction type device must be explosion-proof instrument, it is necessary to which the equipment that can be applied to flammability hazard place for meeting national regulation is explosion-proof
It is required that, investment is thus considerably increased, it is not possessed practical value.3rd, pump suction type methane concentration detector is not suitable for
The environment of low temperature is placed in, can not also be worked for a long time.
Claims (6)
1. a kind of cryogenic natural gas concentration detection apparatus, including sampling unit, guidance unit and data analysis and transmission unit, are adopted
Sample unit includes upsampling filter, sampling pipe, triple valve and flowmeter, and guidance unit includes pressure maintaining valve, core modular components, adopted
The sample mouth of pipe, upsampling filter, triple valve, flowmeter, methane concentration analyzer and analyzer component are sequentially connected, methane concentration point
Analyzer is connected with data analysis with transmission unit respectively with analyzer component, core modular components are connected, and core modular components
Also it is connected with voltage stabilizing valve outlet, gas vent line, data analysis is connected including methane concentration analyzer with transmission unit with dividing
Analyzer component, the data of generation are given to host computer by 4-20mA signal output respectively.
2. cryogenic natural gas concentration detection apparatus according to claim 1, it is characterised in that tested gas is via sampling head
Filter, which is flowed through, to be directed unit and brings analyzer into after sampling pipe.
3. cryogenic natural gas concentration detection apparatus according to claim 1, it is characterised in that sampling pipe is Teflon material, three
Port valve, which can connect sample gas, is used for the demarcation of methane concentration analyzer.
4. cryogenic natural gas concentration detection apparatus according to claim 1, it is characterised in that core modular components are based on text
Testing sample gas is drawn to methane concentration analyzer, sample by principle in mound, the negative pressure produced using the flow of nitrogen or air
Product gas is discharged into air after having measured concentration through analyzer together with nitrogen or air.
5. cryogenic natural gas concentration detection apparatus according to claim 1, it is characterised in that each core modular components is total to
There are 3 interfaces, one of interface is connected with the outlet side of analyzer respectively, one in 2 interfaces connects warp respectively in addition
The nitrogen interface discharged by isocon external member, remaining interface is respectively connected to gas exhaust piping.
6. cryogenic natural gas concentration detection apparatus according to claim 1, it is characterised in that methane concentration analyzer from 0-
The analyzer of 100v% ranges, can realize real-time online measuring；Described device sets at least a set of sampling unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610408590.0A CN107315078A (en) | 2016-06-12 | 2016-06-12 | Cryogenic natural gas concentration detection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610408590.0A CN107315078A (en) | 2016-06-12 | 2016-06-12 | Cryogenic natural gas concentration detection apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107315078A true CN107315078A (en) | 2017-11-03 |
Family
ID=60185682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610408590.0A Pending CN107315078A (en) | 2016-06-12 | 2016-06-12 | Cryogenic natural gas concentration detection apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107315078A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090193884A1 (en) * | 2008-02-01 | 2009-08-06 | Pearl Field Services, Llc | Mobile vacuum sampling system |
| CN103472179A (en) * | 2013-09-29 | 2013-12-25 | 中国寰球工程公司 | System for sampling and component analysis of truck loaded finished liquefied natural gas |
| CN204664883U (en) * | 2015-02-05 | 2015-09-23 | 北京理工大学 | Combustion gas on-line monitoring system in multichannel air sampling type inspection shaft |
| CN204882516U (en) * | 2015-08-19 | 2015-12-16 | 上海莱帝科技有限公司 | Novel gaseous detecting system of formula of breathing in |
| CN105158419A (en) * | 2015-08-25 | 2015-12-16 | 江苏远望仪器有限公司 | Pumping type gas sampling monitoring device |
| CN204882538U (en) * | 2015-07-17 | 2015-12-16 | 上海国纪电子有限公司 | Detection apparatus for combustible gas concentration |
| CN204989134U (en) * | 2015-04-30 | 2016-01-20 | 中国石油天然气股份有限公司 | Air foam flooding oil output online detection device |
-
2016
- 2016-06-12 CN CN201610408590.0A patent/CN107315078A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090193884A1 (en) * | 2008-02-01 | 2009-08-06 | Pearl Field Services, Llc | Mobile vacuum sampling system |
| CN103472179A (en) * | 2013-09-29 | 2013-12-25 | 中国寰球工程公司 | System for sampling and component analysis of truck loaded finished liquefied natural gas |
| CN204664883U (en) * | 2015-02-05 | 2015-09-23 | 北京理工大学 | Combustion gas on-line monitoring system in multichannel air sampling type inspection shaft |
| CN204989134U (en) * | 2015-04-30 | 2016-01-20 | 中国石油天然气股份有限公司 | Air foam flooding oil output online detection device |
| CN204882538U (en) * | 2015-07-17 | 2015-12-16 | 上海国纪电子有限公司 | Detection apparatus for combustible gas concentration |
| CN204882516U (en) * | 2015-08-19 | 2015-12-16 | 上海莱帝科技有限公司 | Novel gaseous detecting system of formula of breathing in |
| CN105158419A (en) * | 2015-08-25 | 2015-12-16 | 江苏远望仪器有限公司 | Pumping type gas sampling monitoring device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112870999B (en) | Judge C in air chamber 4 F 7 N and CO 2 Method for producing impurity gas in mixed gas | |
| CN201417199Y (en) | Leak detection device for aircraft oil tank | |
| CN106770951A (en) | Super low concentration smoke on-line monitoring system and analysis method | |
| CN207689440U (en) | The analytical equipment of trace impurity content in hydrogen isotope gas and/or helium | |
| CN105334278B (en) | Gas chromatograph inlet end trace gas controller | |
| CN205879908U (en) | Compressed air quality detection device for appearance | |
| CN103837304A (en) | Combustible refrigerant simulation leakage device and leakage concentration measurement device | |
| CN108020612A (en) | The analytical equipment and method of trace impurity content in hydrogen isotope gas and/or helium | |
| CN109239229A (en) | A kind of for transformer oil chromatography on-Line Monitor Device | |
| CN207096165U (en) | Mixed gas concentration on-line measurement device | |
| CN108488630A (en) | Experimental device for measuring leakage characteristic of gas pipeline and measuring method thereof | |
| CN106404834A (en) | Test method for explosion suppression and fire resistance performance of structured packing | |
| CN111239304A (en) | System for preparing reference oil sample of dissolved gas component content in insulating oil | |
| US20110197659A1 (en) | Method for determining an overall leakage rate of a vacuum system and vacuum system | |
| CN204679261U (en) | A kind of reduction valve, pressure governor pilot system | |
| CN103487525A (en) | Liquid coolant sampling and component analyzing system | |
| CN105403290A (en) | Natural gas circular flow standard test system | |
| CN107315078A (en) | Cryogenic natural gas concentration detection apparatus | |
| CN117168713A (en) | Helium-hydrogen mass spectrometer leak detector signal rapid processing system and method | |
| CN207198045U (en) | A kind of gas-detecting device for GIS device fault gas chamber fast positioning | |
| CN109781449B (en) | Single skid block and integral testing device of natural gas liquefaction device | |
| CN107315079A (en) | System integration method for cryogenic natural gas Concentration Testing | |
| CN203908834U (en) | Pretreatment system for on-line coal gasification analysis sample | |
| CN106338588A (en) | Testing and calibrating method and device of recharge rate of online detector of sulfur hexafluoride | |
| CN218917382U (en) | Online detection system of total sulfur gas circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171103 |
|
| RJ01 | Rejection of invention patent application after publication |