CN109238794A - A kind of automatic sampling apparatus of shock tube pyrolysis product - Google Patents
A kind of automatic sampling apparatus of shock tube pyrolysis product Download PDFInfo
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- CN109238794A CN109238794A CN201810965468.2A CN201810965468A CN109238794A CN 109238794 A CN109238794 A CN 109238794A CN 201810965468 A CN201810965468 A CN 201810965468A CN 109238794 A CN109238794 A CN 109238794A
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- 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
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Abstract
The present invention relates to a kind of automatic sampling apparatus of shock tube pyrolysis product.This includes pressure gauge, vacuum pump, vacuum valve, hand-operated valve, solenoid valve, high pressure gas cylinder, quantitative loop and heater using device；Shock tube is connected by hand-operated valve, solenoid valve and quantitative loop entrance, quantitative loop outlet is connect with four-way tube inlet, high pressure gas cylinder is connect by pipeline with two air inlet of solenoid valve, two gas outlet of solenoid valve is connected by the one outlet of pipeline and four-way pipe, and pressure gauge is provided between solenoid valve two and four-way pipe, vacuum pump is connect by pipeline with vacuum valve air inlet, another of vacuum valve air gate and four-way pipe outlet connection, remaining four-way pipe outlet are connected by pipeline and the chromatograph of detection device.Solving traditional manual, to collect process in the mode of gas pyrolysis product cumbersome, complicated for operation, the problems such as inefficiency.It is succinct with operation, the advantages that improving efficiency, guarantee the purity and temperature of gas pyrolysis product.
Description
Technical field
The present invention relates to gaseous product sampling technique fields, and in particular to a kind of automatic sampling cartridge of shock tube pyrolysis product
It sets.
Background technique
Shock tube is a kind of experimental provision that plane shock is generated with gas dynamics.As the reality that can produce high temperature
Test tool.Have the characteristics that other chemical reactors are unexistent in terms of researching high-temperature science and short transition effect, shock wave only adds
Thermal response gas largely eliminates wall effect without heating wall.Lead to the grain chemically reacted in gas
Collision between son is determined by molecular thermalmotion, is real " heat " process.Shock wave heating gas is consumed except corrugated
It dissipates outside layer, gas is thermally equilibrated.Obviously, has the condition as a kind of ideal chemical reactor, in addition using comparison speed
Rate method and free radical cleaning technology, so that shock tube experiment method can conduct a research work in chemical kinetics field.
Resler, Bauer and Lifshitz of Cornell in 1063 et al. propose a new departure, i.e., in common shock wave
The big absorption chamber that an initial pressure is equal to low pressure chamber pressure is added at pipe low-pressure chamber diaphragm, to absorb and eliminate two
Subpulse.It is referred to as " magic hole ".This evil spirit hole type single pulse shock tube is controlled due to not needing the rupture of membranes of twice film, than early
First Chemical Shock Tube is easy to operate, reproducible.
In common shock tube, research Chemical Kinetics mostly uses optical absorption method to measure a certain reactant or reaction
The advantages of product evolution of its concentration at any time after shock wave heating, single pulse shock tube then sacrifices this real-time measurement, and
It is the cooled product analysis after doing shock wave heating end-of-pulsing.The benefit of this method is can sufficiently to use traditional analysis
Method is detected, and higher sensitivity can be obtained, with gas-chromatography, the just easily microcomponent of detection ppm magnitude,
And obtain be whole final products distribution, it, which contains bigger information content, can use.
Cooled product will do static analysis, so needing to design a sampling system, shock tube and gas-chromatography
Instrument connects carry out sample analysis.Due to the high sensitivity (sample concentration can be measured to 10ppm) of gas chromatograph and right
The separating degree that different plant species have had, thus the ultimate density of reaction product can be provided.
The gas collection and detection method that major part shock tube experiment uses at present are: collecting work using collection airbag etc. manually
Then tool acquisition gas pyrolysis product is manually added driving gas into collection airbag, and reaches gas chromatograph injection port requirement
Operating pressure, the air inlet that sample is finally connected to gas chromatograph manually again detect.Process is cumbersome, complicated for operation, effect
Rate is low.
In traditional manual mode, gas collecting apparatus not can guarantee the state of its inner vacuum before collecting, and contain a small amount of impurity gas
Body, therefore after gas pyrolysis product enters gas collecting apparatus, it is mixed with foreign gas, purity reduces.And in conventional manner, greatly
Part gas collecting apparatus is in normal temperature state, can be because temperature, which reduces, generates absorption after high-temperature split product enters gas collecting apparatus.
To sum up, into the gaseous product in gas chromatograph compared with the gaseous product generated in shock tube, purity is had occurred centainly
Variation, testing result can be had a huge impact.
In traditional manual mode, since the inlet charge of most of gas chromatograph requires pressure to be higher than atmospheric pressure (this
Device is 2atm), so also to add driving gas into collection airbag to gas phase color after collection has conveyed gas pyrolysis product
The admission pressure that spectrometer injection port requires.It operates very complicated, and is difficult accurately to reach using gas collecting apparatus feed drive gas
The pressure service condition pressure value of gas chromatograph.
Summary of the invention
The purpose of the present invention is to provide a kind of automatic sampling apparatus of shock tube pyrolysis product, solve traditional manual receipts
The problems such as process is cumbersome in the mode of collection gas pyrolysis product, complicated for operation, inefficiency.It is succinct with operation, it improves efficiency,
The advantages that guaranteeing the purity and temperature of gas pyrolysis product.
The technical scheme is that a kind of automatic sampling apparatus of shock tube pyrolysis product includes pressure gauge 7, vacuum pump
8, vacuum valve 9, hand-operated valve 2, solenoid valve 1, solenoid valve 26, high pressure gas cylinder 5, quantitative loop 4 and heater 10；
Shock tube 1 passes through pipeline and connect with 2 air inlet of hand-operated valve, and 2 air inlet of hand-operated valve connects with one 3 air inlet of solenoid valve
It connects, one 3 gas outlet of solenoid valve is connect with quantitative loop entrance, and quantitative loop outlet is connect with four-way tube inlet, and high pressure gas cylinder 5 passes through pipe
Road is connect with 26 air inlet of solenoid valve, and 26 gas outlet of solenoid valve is connected by the one outlet of pipeline and four-way pipe, and electromagnetism
Pressure gauge 7 is provided between valve 26 and four-way pipe, vacuum pump 8 is connect by pipeline with 9 air inlet of vacuum valve, 9 outlet of vacuum valve
Another outlet of mouth and four-way pipe connects, and remaining four-way pipe outlet passes through pipeline and the connection of the chromatograph of detection device.
Quantitative loop 4 includes aluminum pipe, heat preservation asbestos and cabinet；Aluminum pipe disk is at spiral ring, and aluminum pipe periphery is enclosed with heat preservation
Asbestos, spiral aluminum pipe are fixed in cabinet.
Heater 10 uses heating tape, and heating tape is wrapped in quantitative loop 4.
The invention has the advantages that 1, gas collecting mode of the invention, solves low efficiency in traditional manual gas collecting mode
Under, it is complicated for operation the disadvantages of；2, the present invention by by the gentle chromatography of shock wave pipe end directly it is closed be connected, solve biography
It unites the impure problem of the gas be easy to causeing in manual gas collecting mode；3, sampling system has and shock wave pipe end phase in the present invention
Same heating system can heat and keep identical temperature simultaneously, solve in traditional manual mode due to gas collecting apparatus temperature
The disadvantages of absorption of gaseous product caused by lower；4, the driving method that the present invention uses, solving makes in transmission manual mode
With gas collecting apparatus feed drive gas be difficult the problem of accurately reaching gas chromatograph injection port maximum continuous boost value (such as this
The 2atm of device).
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the automatic sampling apparatus of shock tube pyrolysis product of the present invention.
Specific embodiment
Technical solution of the present invention is described in further detail with reference to the accompanying drawings of the specification.
As described in Figure 1, a kind of automatic sampling apparatus of shock tube pyrolysis product of the present invention includes extract system and sampling
System.
Extract system includes pressure gauge 7, vacuum pump 8 and vacuum valve 9.
Sampling system includes shock tube 1, hand-operated valve 2, solenoid valve 1, solenoid valve 26, high pressure gas cylinder 5, quantitative loop 4 and adds
Hot device 10.Heater uses heating tape, and heating tape is wrapped in quantitative loop.
Shock tube 1 passes through pipeline and connect with 2 air inlet of hand-operated valve, and 2 air inlet of hand-operated valve connects with one 3 air inlet of solenoid valve
It connects, one 3 gas outlet of solenoid valve is connect with quantitative loop entrance, and quantitative loop outlet is connect with four-way tube inlet, and high pressure gas cylinder 5 passes through pipe
Road is connect with 26 air inlet of solenoid valve, and 26 gas outlet of solenoid valve is connected by the one outlet of pipeline and four-way pipe, and electromagnetism
Pressure gauge 7 is provided between valve 26 and four-way pipe, vacuum pump 8 is connect by pipeline with 9 air inlet of vacuum valve, 9 outlet of vacuum valve
Another outlet of mouth and four-way pipe connects, and remaining four-way pipe outlet passes through pipeline and the connection of the chromatograph of detection device.It is fixed
Amount ring includes aluminum pipe, heat preservation asbestos and cabinet.Aluminum pipe disk is at spiral ring, and aluminum pipe periphery is enclosed with heat preservation asbestos, spiral aluminium
Pipe is fixed in cabinet.
Carrying out detection process using a kind of automatic sampling apparatus of shock tube pyrolysis product of the present invention is, before detection, operation
Vacuum pump 8 opens vacuum valve 9, observes 7 registration of pressure gauge, the whole system in addition to high pressure gas cylinder 5 is evacuated to vacuum.Then it closes
Vacuum valve 9 is closed, vacuum pump 8 is stopped.Hand-operated valve 2 is first opened, then opens solenoid valve 1, makes the gas pyrolysis product in shock tube 1
Automatically into quantitative loop, solenoid valve 1 is closed.Heater 10 is that quantitative loop and quantitative loop entrance heat, and gas is heated to
It is mutually synthermal with shock tube.After gas pyrolysis product enters quantitative loop 4 in shock tube 1, the valve of high pressure gas cylinder 5 is opened, is adjusted
Output pressure then opens solenoid valve 26, makes to drive gas will be in quantitative loop 4 to 2atm (chromatograph operating condition is 2atm)
Gas pyrolysis product, which enters in chromatograph 11, to be detected, and testing result passes through Computer display and analysis.
Embodiment described in the invention is a part of the embodiment of the present invention, instead of all the embodiments.Based on this hair
Embodiment in bright, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (3)
1. a kind of automatic sampling apparatus of shock tube pyrolysis product, it is characterized in that: this includes pressure gauge 7, vacuum pump using device
8, vacuum valve 9, hand-operated valve 2, solenoid valve 1, solenoid valve 26, high pressure gas cylinder 5, quantitative loop 4 and heater 10；
Shock tube 1 is connect by pipeline with 2 air inlet of hand-operated valve, 2 air inlet of hand-operated valve with and one 3 air inlet of solenoid valve connect,
One 3 gas outlet of solenoid valve is connect with quantitative loop entrance, and quantitative loop outlet is connect with four-way tube inlet, and high pressure gas cylinder 5 passes through pipeline
It is connect with 26 air inlet of solenoid valve, 26 gas outlet of solenoid valve is connected by the one outlet of pipeline and four-way pipe, and solenoid valve
Pressure gauge 7 is provided between 26 and four-way pipe, vacuum pump 8 is connect by pipeline with 9 air inlet of vacuum valve, 9 gas outlet of vacuum valve
Another outlet with four-way pipe connects, and remaining four-way pipe outlet is connected by pipeline and the chromatograph of detection device.
2. a kind of automatic sampling apparatus of shock tube pyrolysis product described in accordance with the claim 1, it is characterised in that: quantitative loop 4
Including aluminum pipe, heat preservation asbestos and cabinet；Aluminum pipe disk is at spiral ring, and aluminum pipe periphery is enclosed with heat preservation asbestos, and spiral aluminum pipe is solid
It is scheduled in cabinet.
3. a kind of automatic sampling apparatus of shock tube pyrolysis product described in accordance with the claim 1, it is characterised in that: heater 10
Using heating tape, heating tape is wrapped in quantitative loop 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810965468.2A CN109238794A (en) | 2018-08-23 | 2018-08-23 | A kind of automatic sampling apparatus of shock tube pyrolysis product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810965468.2A CN109238794A (en) | 2018-08-23 | 2018-08-23 | A kind of automatic sampling apparatus of shock tube pyrolysis product |
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| CN109238794A true CN109238794A (en) | 2019-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810965468.2A Pending CN109238794A (en) | 2018-08-23 | 2018-08-23 | A kind of automatic sampling apparatus of shock tube pyrolysis product |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110750121A (en) * | 2019-12-03 | 2020-02-04 | 中北大学 | Overtemperature automatic power-off temperature-controllable heating system for shock tube heating |
| CN114427991A (en) * | 2020-09-23 | 2022-05-03 | 中国石油化工股份有限公司 | Gas sample introduction bottle, gas isotope analysis system and method |
| CN115112796A (en) * | 2022-06-24 | 2022-09-27 | 天津大学 | Gas sampling detection system for shock tube |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784889A (en) * | 2014-12-25 | 2016-07-20 | 中国科学院广州能源研究所 | Rapid analysis system and method of crude fuel gas tar content |
| CN206696026U (en) * | 2017-03-28 | 2017-12-01 | 江西洪图环保有限公司 | A kind of on-line computing model metering device |
-
2018
- 2018-08-23 CN CN201810965468.2A patent/CN109238794A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784889A (en) * | 2014-12-25 | 2016-07-20 | 中国科学院广州能源研究所 | Rapid analysis system and method of crude fuel gas tar content |
| CN206696026U (en) * | 2017-03-28 | 2017-12-01 | 江西洪图环保有限公司 | A kind of on-line computing model metering device |
Non-Patent Citations (1)
| Title |
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| 闫卫峰 等: "酚醛树脂高温热解的激波管实验研究", 《力学学报》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110750121A (en) * | 2019-12-03 | 2020-02-04 | 中北大学 | Overtemperature automatic power-off temperature-controllable heating system for shock tube heating |
| CN114427991A (en) * | 2020-09-23 | 2022-05-03 | 中国石油化工股份有限公司 | Gas sample introduction bottle, gas isotope analysis system and method |
| CN114427991B (en) * | 2020-09-23 | 2024-05-14 | 中国石油化工股份有限公司 | Gas sample injection bottle, gas isotope analysis system and method |
| CN115112796A (en) * | 2022-06-24 | 2022-09-27 | 天津大学 | Gas sampling detection system for shock tube |
| CN115112796B (en) * | 2022-06-24 | 2023-09-29 | 天津大学 | Gas sampling detection system for shock tube |
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