CN110006949A - Gas burst experimental provision and method based on product analysis - Google Patents
Gas burst experimental provision and method based on product analysis Download PDFInfo
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- 238000004458 analytical method Methods 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000007789 gas Substances 0.000 claims abstract description 136
- 238000004880 explosion Methods 0.000 claims abstract description 104
- 239000000463 material Substances 0.000 claims abstract description 83
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 68
- 230000001052 transient effect Effects 0.000 claims abstract description 20
- 239000002737 fuel gas Substances 0.000 claims abstract description 15
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 5
- 239000010959 steel Substances 0.000 claims abstract description 5
- 229910000838 Al alloy Inorganic materials 0.000 claims description 41
- 238000002474 experimental method Methods 0.000 claims description 16
- 238000012360 testing method Methods 0.000 claims description 16
- 238000004364 calculation method Methods 0.000 claims description 4
- 238000005336 cracking Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 238000004506 ultrasonic cleaning Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 230000004888 barrier function Effects 0.000 claims 2
- 239000000567 combustion gas Substances 0.000 claims 2
- 229910052755 nonmetal Inorganic materials 0.000 claims 1
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 abstract description 66
- 239000001294 propane Substances 0.000 abstract description 31
- 230000007246 mechanism Effects 0.000 abstract description 23
- 238000005516 engineering process Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 abstract description 3
- 239000003570 air Substances 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 abstract description 2
- 239000000047 product Substances 0.000 description 45
- 238000006243 chemical reaction Methods 0.000 description 44
- 238000011160 research Methods 0.000 description 20
- 239000002360 explosive Substances 0.000 description 14
- 229910002092 carbon dioxide Inorganic materials 0.000 description 11
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 238000005474 detonation Methods 0.000 description 5
- 150000002430 hydrocarbons Chemical class 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- 150000001335 aliphatic alkanes Chemical class 0.000 description 4
- 229930195733 hydrocarbon Natural products 0.000 description 4
- 239000004615 ingredient Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 4
- 150000003254 radicals Chemical class 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 239000000523 sample Substances 0.000 description 4
- 230000001629 suppression Effects 0.000 description 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 3
- 239000005977 Ethylene Substances 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 239000000284 extract Substances 0.000 description 3
- 238000002290 gas chromatography-mass spectrometry Methods 0.000 description 3
- 125000001570 methylene group Chemical group [H]C([H])([*:1])[*:2] 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 2
- 125000000217 alkyl group Chemical group 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005422 blasting Methods 0.000 description 2
- 230000000875 corresponding effect Effects 0.000 description 2
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- 238000010586 diagram Methods 0.000 description 2
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- 238000004519 manufacturing process Methods 0.000 description 2
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- 238000012544 monitoring process Methods 0.000 description 2
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- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- WFJIVOKAWHGMBH-UHFFFAOYSA-N 4-hexylbenzene-1,3-diol Chemical compound CCCCCCC1=CC=C(O)C=C1O WFJIVOKAWHGMBH-UHFFFAOYSA-N 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010504 bond cleavage reaction Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
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- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
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- 238000012545 processing Methods 0.000 description 1
- 238000007348 radical reaction Methods 0.000 description 1
- 239000012495 reaction gas Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/50—Investigating or analyzing materials by the use of thermal means by investigating flash-point; by investigating explosibility
- G01N25/54—Investigating or analyzing materials by the use of thermal means by investigating flash-point; by investigating explosibility by determining explosibility
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- 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
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Abstract
The invention discloses a kind of gas burst experimental provision and method based on product analysis, including flammable premixed gas body explosion pipeline, transient pressure acquisition system and ignition system；Ignition system is connect with ignitor；Transient pressure acquisition system is connect with computer and transient pressure sensor；Flammable premixed gas body explodes pipeline for closed rectangular or circular pipe；Flammable premixed gas body explosion pipeline is provided with block blast-proof materials；Flammable premixed gas body explosion pipeline is connected with circulating pump, fuel gas steel cylinder and tail gas collecting device.Separated explosion-proof comparative experimental study can be carried out to the premixed gas of methane, propane and air, gas burst product is tested and analyzed, in conjunction with the measurement of gas burst characteristic parameter, gas burst Separated explosion-proof effect study method is proposed, to disclose flammable gas explosion mechanism, seeking to inhibit gas burst new technology significant.
Description
Technical field
The present invention relates to a kind of gas burst experimental technique more particularly to a kind of gas burst experiments based on product analysis
Device and method.
Background technique
Currently, all kinds of flammable industrial gasses demands are increased sharply, operating condition and use environment become increasingly complex, therefore cause
Gas burst accident happen occasionally, to safety in production and social stability all bring immense pressure.It is quick-fried to deeply develop learning gas
Fried experimental method, to disclose blast characteristics and mechanism, seeking effectively to inhibit flammable gas explosion technology significant.
Jin Chao etc. shows flammable gas explosion under complex working condition to the Review Study of recent domestic gas burst characteristic
Harm research be concentrated mainly on pressure, critical oxygen concentration, explosion limit, numerical simulation etc., gas burst reaction mechanism,
The influence of complex working condition to blast characteristics etc. research is lacking.Razus, Domnina etc. are monitored flammable using sensor
Gas burst pressure and temperature probes into the changing rule between pressure, temperature and time, distance etc. and related influence factor,
It show that maximum explosion pressure and the initial temperature upper limit are inversely proportional, not only intuitively expresses blast characteristics, be also to find datonation-inhibition side
Formula provides reference.Kim, Woo Kyung etc. utilizes the research flammable gas explosion flame such as high speed camera, schlieren
Formation and the mechanism of transmission, probe into influence of the different factors to flame, and initial temperature raising leads to flame speed and heat release rate
Faster, close to chemical equivalent concentration its flame is thicker, spread speed is faster, displacement is bigger, flame speed be represented by v=a ×
(L/D)+b etc. provides fundamental basis for the injury of prevention explosive flame and the research of back-fire relief equipment.Nie, Baisheng etc. are utilized
The softwares such as Chemkin, Fluent, AutoReaGas, FLACS are anti-to the pressure, temperature, chain type of the fuel gas under different condition
Numerical simulations, learning gas blast characteristics and mechanism should be waited, plays the role of supplementary explanation to experiment, decreases manpower wealth
The difficulty that the consumption of power and experiment porch are built plays an important role prevention and control explosion accident.These researchs
Mode is mainly set about from explosive characteristic parameter and numerical simulation analysis, is more lacked to the research of flammable gas explosion product analysis.
In terms of gas burst mechanism and inhibiting mechanism research, it is quick-fried in gas that Yang Zhenli etc. describes datonation-inhibition medium in recent years
The physical chemistry explosion suppression mechanism of the mechanism of action and current block blast-proof materials during fried proposes datonation-inhibition there is still a need for increasing from now on
The research of mechanism and the design of explosion-suppressing material structure.Kalvakala, Krishna C etc. simulates the heat scission reaction mechanism of propane, obtains
Part reaction primitive path is gone out.Fedyaeva, Oxana N etc. has obtained the fuel excess such as propane and limited temperature range (T
≤ 640K) it can identify intermediate oxidation product and its formation mechenism.
In the prior art, also few people study explosion suppression mechanism, premixed gas explosion product by way of gas component
Component and its concentration have directly reacted the severe degree and process of explosive reaction.
Summary of the invention
The object of the present invention is to provide a kind of gas burst experimental provision and method based on product analysis.
The purpose of the present invention is what is be achieved through the following technical solutions:
Gas burst experimental provision based on product analysis of the invention, including flammable premixed gas body explosion pipeline, transient state
Pressure acquisition system and ignition system；
The ignition system is connect with the ignitor for being set to flammable premixed gas body explosion pipeline one end；
The transient pressure acquisition system and computer and the transient state pressure on flammable premixed gas body explosion duct wall
Force snesor connection；
The flammable premixed gas body explosion pipeline is closed rectangular or circular pipe；
The flammable premixed gas body explosion pipeline is provided with block blast-proof materials；
The flammable premixed gas body explosion pipeline is connected with circulating pump, fuel gas steel cylinder and tail gas collecting device.
The method that gas burst experimental provision based on product analysis of the invention carries out gas burst experiment, feature exist
In, comprising steps of
A, aluminium alloy block blast-proof materials is rolled into column, with ultrasonic cleaning ten minutes, is packed into blasting cartridge after dry
In road, pipeline igniter head end leaves a blank 5%, and effectively to light a fire, remaining space uniform of experimental channel loads block blast-proof materials,
It returns and installs sealing cover；
B, intake valve, valve two are closed, air outlet valve and valve one are opened, opens circulating pump, extracts air in pipeline out, is utilized
Pressure gauge tests device, it is ensured that has good air-tightness under pipeline 0.1MPa negative pressure；
C, pipeline inner part air is extracted out using circulating pump, make the negative pressure for forming 0.07MPa in pipeline, close air outlet valve,
Valve two opens valve three and intake valve, the fuel gas of calculation amount volume is accurately injected into pipeline, and fill into pipeline
Air is allowed to form normal pressure；
D, valve one and valve three are closed, valve two, intake valve and air outlet valve are opened, opens circulating pump, in circulating line
Gas five minutes, stand five minutes；
E, point, which is fought, acquires blast pressure data: setting ignition energy is 500mJ, cracking pressure sensing system, point of discharge
Fire acquires pressure data；
F, after explosion, air outlet valve and valve one are opened, closes valve two and intake valve, interface connects at valve two
Collection of products device, the tail gas after collecting explosion carry out the detection of product component using gas chromatographicanalyzer, mass spectrograph and divide
Analysis.
As seen from the above technical solution provided by the invention, the gas provided in an embodiment of the present invention based on product analysis
Body explosion experimental facility and method can carry out Separated explosion-proof comparative experimental study to the premixed gas of methane, propane and air,
Gas burst product is tested and analyzed, in conjunction with the measurement of gas burst characteristic parameter, proposes gas burst Separated explosion-proof effect
Research method is answered, to disclose flammable gas explosion mechanism, seeking to inhibit gas burst new technology significant.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the gas burst experimental provision provided in an embodiment of the present invention based on product analysis；
Fig. 2 is methane difference operating condition blast pressure figure in the embodiment of the present invention；
Fig. 3 is propane difference operating condition blast pressure figure in the embodiment of the present invention；
Fig. 4 is hollow pipeline of embodiment of the present invention propane explosion product gas chromatogram；
Fig. 5 is that propane explosion product gas chromatogram after block blast-proof materials is filled in the embodiment of the present invention.
In figure:
1- data receiver computer, 2- transient pressure acquisition cabinet, 3- high-energy ignition testing stand, 4- transient pressure sensor,
5- outlet valve, 6- explosive test pipeline, 7- air intake valve, 8- pneumatic circulating pump, 9- valve one, 10- collection of products device,
11- valve two, 12- valve three, 13- pressure gauge, 14- fuel gas steel cylinder.
Specific embodiment
The embodiment of the present invention will be described in further detail below.What is be not described in detail in the embodiment of the present invention is interior
Appearance belongs to the prior art well known to professional and technical personnel in the field.
Gas burst experimental provision based on product analysis of the invention, preferable specific embodiment is:
Including flammable premixed gas body explosion pipeline, transient pressure acquisition system and ignition system；
The ignition system is connect with the ignitor for being set to flammable premixed gas body explosion pipeline one end；
The transient pressure acquisition system and computer and the transient state pressure on flammable premixed gas body explosion duct wall
Force snesor connection；
The flammable premixed gas body explosion pipeline is closed rectangular or circular pipe；
The flammable premixed gas body explosion pipeline is provided with block blast-proof materials；
The flammable premixed gas body explosion pipeline is connected with circulating pump, fuel gas steel cylinder and tail gas collecting device.
The ignitor includes high-energy ignition instrument and igniter head, and between ignition energy 1-1000mJ, ignition energy is controllable.
The pressure sensor includes transient state sensor, and frequency acquisition is 200-40 times/ms, and surveying pressure range is 0~5MPa.
The flammable premixed gas body explosion duct length is 500mm, diameter wide 60mm, wall thickness 6mm, and designing maximum pressure-bearing is
10MPa。
The block blast-proof materials is aluminum alloy materials, and thick 0.5mm forms honeycomb hexagonal hole after stretching.
The flammable premixed gas body is that methane air premixed gas concentration is 9.5%V/V or Propane-air premixed gas
Concentration is 5%V/V.
Gas burst experimental method based on product analysis of the invention, preferable specific embodiment is:
Comprising steps of
A, aluminium alloy block blast-proof materials is rolled into column, with ultrasonic cleaning ten minutes, is packed into blasting cartridge after dry
In road, pipeline igniter head end leaves a blank 5%, and effectively to light a fire, remaining space uniform of experimental channel loads block blast-proof materials,
It returns and installs sealing cover；
B, intake valve, valve two are closed, air outlet valve and valve one are opened, opens circulating pump, extracts air in pipeline out, is utilized
Pressure gauge tests device, it is ensured that has good air-tightness under pipeline 0.1MPa negative pressure；
C, pipeline inner part air is extracted out using circulating pump, make the negative pressure for forming 0.07MPa in pipeline, close air outlet valve,
Valve two opens valve three and intake valve, the fuel gas of calculation amount volume is accurately injected into pipeline, and fill into pipeline
Air is allowed to form normal pressure；
D, valve one and valve three are closed, valve two, intake valve and air outlet valve are opened, opens circulating pump, in circulating line
Gas five minutes, stand five minutes；
E, point, which is fought, acquires blast pressure data: setting ignition energy is 500mJ, cracking pressure sensing system, point of discharge
Fire acquires pressure data；
F, after explosion, air outlet valve and valve one are opened, closes valve two and intake valve, interface connects at valve two
Collection of products device, the tail gas after collecting explosion carry out the detection of product component using gas chromatographicanalyzer, mass spectrograph and divide
Analysis.
It can carry out following any experiment and its data and analysis:
The explosion test of methane air premixed gas, Propane-air premixed gas explosion test.
Gas burst experimental provision and method based on product analysis of the invention can be tested in flammable gas explosion and be closed
Explosion test is carried out to the premixed gas of methane, propane and air respectively in pipeline, monitoring explosion transient pressure variation is simultaneously right
Explosion product carry out GC-MS method, probe into aluminium alloy block blast-proof materials to premixed gas explosion transient pressure, product at
The influence divided, the relationship of both research changing rule.The result shows that: methane air premixed gas loads aluminium alloy Separated explosion-proof
After material, detonation pressure peak reduces by 383%, and remaining unreacted methane content improves 2.7 times in explosion product；Propane-air
After premixed gas loads aluminium alloy block blast-proof materials, detonation pressure peak reduces by 191%, remaining unreacted third in explosion product
Alkane content improves 5.6 times, CO, CO2Content significantly reduces, and hydro carbons by-product significantly increases.Research work proves, Separated explosion-proof material
Material keeps gas burst reaction insufficient, has seriously affected radical reaction course, and in advance and to accelerate gas burst free radical anti-
The chain termination reaction answered, to achieve the purpose that Separated explosion-proof.It can be effective by the New Research Method of foundation of explosion product analysis
Gas burst blocking effect is assessed, to disclose flammable gas explosion mechanism, seeking that the new technology of gas burst is inhibited to have important meaning
Justice.
Specific embodiment:
One, Preparatory work of experiment and step
1.1 experimental system
Experimental system is mainly made of flammable premixed gas body explosion pipeline, transient pressure acquisition system and ignition system.
1, ignition system is made of high-energy ignition instrument and igniter head, and between ignition energy 1-1000mJ, ignition energy is controllable.
2, pressure acquisition system is made of transient pressure sensor and related software, and frequency acquisition is 200-40 times/ms, is surveyed
Pressure range is 0~5MPa.
3, experimental channel is the closed rectangular or circular pipe of designed, designed processing, length 500mm, the wide 60mm of diameter, wall
Thickness is 6mm, and designing maximum pressure-bearing is 10MPa.Experimental system schematic diagram is as shown in Figure 1.
1.2 laboratory apparatus and material
1, experiment is aluminum alloy materials with block blast-proof materials, thick 0.5mm, and honeycomb hexagonal hole is formed after stretching.Closely
Mainly from experimental method, container draw ratio, rate etc. of leaving a blank expansion research over year, the material is widely used in China and adds at present
The anti-explosion safety measure of petrol station refined oil storage tank.
2, according to chemical reaction equivalent molar ratio calculated result, preparation methane air premixed gas concentration is 9.5% (V/
V), Propane-air premixed gas concentration is 5% (V/V).
CH4+2O2=2H2O+CO2△ H=413kJ/mol
C3H8+5O2=4H2O+3CO2△ H=2217.8kJ/mol
3, gas chromatography mass spectrometry detecting instrument model are as follows: GC7890, analysis condition are as follows: injection port 250, detector 300, sample volume
For 1ml, column flow 8ml/min, after keeping 60 DEG C of 10min of chromatographic column program, 20 DEG C/min of heating rate is set, is risen
To 130 DEG C, after retaining 5min, 25 DEG C/min continues to rise to 150 DEG C, retains 26min.
1.3 experimental procedure
1, aluminium alloy block blast-proof materials is rolled into cylindric, with ultrasonic cleaning ten minutes, is packed into explosion after dry
In pipeline, pipeline igniter head end leaves a blank 5%, and effectively to light a fire, remaining space uniform of experimental channel loads Separated explosion-proof material
Material returns and installs sealing cover.
2, intake valve, valve two are closed, air outlet valve and valve one are opened, opens circulating pump, extracts air in pipeline out, is utilized
Pressure gauge tests device, it is ensured that has good air-tightness under pipeline 0.1MPa negative pressure.
3, pipeline inner part air is extracted out using circulating pump, make the negative pressure for forming 0.07MPa in pipeline, close air outlet valve,
Valve two opens valve three and intake valve, the fuel gas of calculation amount volume is accurately injected into pipeline, and fill into pipeline
Air is allowed to form normal pressure.
4, valve one and valve three are closed, valve two, intake valve and air outlet valve are opened, opens circulating pump, in circulating line
Gas five minutes, stand five minutes.5, point, which is fought, acquires blast pressure data: setting ignition energy is 500mJ, cracking pressure sensing
Device system, discharge igniting acquire pressure data.
6, after exploding, air outlet valve and valve one are opened, closes valve two and intake valve, interface connects at valve two
Collection of products device, the tail gas after collecting explosion, the inspection of product component is carried out using instruments such as gas chromatographicanalyzer, mass spectrographs
It surveys and analyzes.
Two, experimental data and analysis
2.1 methane air premixed gas explosion tests
In 9.5% methane air premixed gas explosion test, pressure peak after aluminium alloy block blast-proof materials is not loaded
It is 151.0375 milliseconds the time required to reaching surge pressure from lighting for 309kPa；It is pressed after loading aluminium alloy block blast-proof materials
Power peak value is 64kPa, is 55.7 milliseconds the time required to reaching surge pressure from lighting；Pressure peak is substantially reduced, and drop decreases by
382.8%.It loads aluminium alloy block blast-proof materials after-explosion pressure peak simultaneously to occur in advance, illustrates that the material has ceased explosion
The path of reaction.Methane is loading aluminium alloy block blast-proof materials and is not loading block blast-proof materials blast pressure such as Fig. 2 institute
Show.
Methane remnants rate after loading the explosion of aluminium alloy block blast-proof materials is 1.27%, accounts for explosion preceding 13.37%, does not fill out
The methane remnants rate for filling block blast-proof materials is 0.34%, accounts for explosion preceding 3.58%, loading block blast-proof materials residual volume is not
Load 3.74 times of material residues amount.It loads aluminium alloy block blast-proof materials and does not load remaining first after block blast-proof materials explosion
Alkane is as shown in table 1.
The remaining situation table in methane explosion front and back under the different operating conditions of table 1
After loading aluminium alloy block blast-proof materials, the amount of residual methane increases, and shows that methane explosive reaction does not carry out completely,
Aluminium alloy block blast-proof materials honeycomb structure and endothermic nature prevent the complete progress of reaction.And pressure peak mentions after exploding
Preceding appearance has direct relation with pressure reduction and methane explosive combustion reaction process, illustrate the continuation of the material stopped reaction into
Row, methane explosive reaction heat can not discharge completely, and gas molar score is accordingly reduced after reaction, is eventually led to pressure and is obviously dropped
It is low.
2.2 Propane-air premixed gas explosion tests
In 5% Propane-air premixed gas explosion test, not loading block blast-proof materials group pressure peak is
372kPa is 117.225 milliseconds the time required to reaching surge pressure from lighting；Pressure spike after filling aluminium alloy block blast-proof materials
It is 103.3125 milliseconds that value, which is 128kPa from lighting the time required to reaching surge pressure,.Loading block blast-proof materials causes to explode
Pressure peak is substantially reduced, and decreases by 190.6%.But pressure peak time of occurrence does not shift to an earlier date significantly, but in the time
Slow burning has occurred in section, just starts to cause explosion after reaching a certain level.Propane is loading aluminium alloy Separated explosion-proof material
Material and not load block blast-proof materials blast pressure as shown in Figure 3.
To 5% Propane-air premixed gas explosion product constituent analysis show load aluminium alloy block blast-proof materials with not
It is essentially identical to load block blast-proof materials gaseous product composition, but there are notable differences for content.Load aluminium alloy Separated explosion-proof material
Propane remnants rate is 0.935% after material explosion, accounts for explosion preceding 18.7%, not loading block blast-proof materials group propane residual fraction is
0.142%, explosion preceding 2.84% is accounted for, increases by 5.58 times.Load CO after aluminium alloy block blast-proof materials explodes2Content is
0.029%, not loading block blast-proof materials group is 0.297%, and growth rate is -90.24%.Load aluminium alloy Separated explosion-proof material
CO content is 0.066% after material explosion, and not loading block blast-proof materials group is 4.596%, and growth rate is -98.56%.Load aluminium
O after the explosion of alloy block blast-proof materials2Content is 20.959%, and not loading block blast-proof materials group is 17.144%, growth rate
It is 22.25%.Propane reaction simultaneously generates other fuel gas, such as methane, ethylene.Load aluminium alloy block blast-proof materials
Block blast-proof materials group explosion gas component and content are not loaded as shown in table 2 and table 3.
Product component and volume fraction table after 2 propane of table explodes under different operating conditions
Propane remnants situation table under the different operating conditions of table 3
After loading aluminium alloy block blast-proof materials, propane remnants increase, and it is incomplete to show that propane explosive reaction carries out；It participates in
The propane of reaction can not the reaction was continued, is converted to the lesser fuel gas of other molecular weight after forming alkyl, causes propane final
Oxidation product CO and CO2It significantly reduces, illustrates that aluminium alloy block blast-proof materials structure and property prevent the complete progress of reaction.
And pressure reduction and propane explosive combustion reaction process have direct relation.Illustrate continuing for the material stopped reaction, propane
Explosive reaction heat can not discharge completely, and gas molar score is accordingly reduced after reaction, eventually lead to pressure and be substantially reduced.
2.3 results and discussion
9.5% methane air and 5% Propane-air explosion reaction completely generate water and carbon dioxide under ideal conditions.But
The explosive reaction mechanism of methane and propane is extremely complex in practice, if methane explodes elementary reaction 325, product component 53
It is a；Propane explosion can use elementary reaction 593.Herein by load aluminium alloy block blast-proof materials with do not load it is flammable under material
The analysis of gas burst pressure and product component discloses block blast-proof materials explosion suppression mechanism, establish with explosion product at
Analysis is the premixed gas explosion mechanism New Research Method of foundation.
1, flammable premixed gas explosion product ingredient and Separated explosion-proof effect have corresponding relationship
After loading aluminium alloy block blast-proof materials, methane residual volume increases；Propane is obtained more in detail by gas chromatography mass spectrometry
Ingredient, mainly have a C3H8、CO、CO2、CH4、C2H6、C2H4、C3H6, illustrate that explosive reaction is incomplete.Product component and pressure
Power shows that the honeycomb structure of aluminium alloy block blast-proof materials and the thermal conductivity of aluminium alloy etc. make the explosion of fuel gas narrow
It is carried out in small space, explosion gas and fire combustion is cut and divided, explosion heat is absorbed by aluminium alloy, hinders gas quick-fried
Fried reaction is carried out continuously, and explosion heat can not discharge completely, and blast pressure is caused to be substantially reduced.Fuel gas remnants rate is got over
Height, the participation extent of reaction is lower, and heat release is more incomplete, causes blast pressure lower.
2, the mechanism that flammable gas explosion production concentration and Separated explosion-proof effect generate has corresponding relationship
After loading aluminium alloy block blast-proof materials, fuel gas remnants rate be increased significantly, and be above 13% or more, quick-fried
Fried 190% or more pressure reduction.In propane product, CO, CO after aluminium alloy block blast-proof materials are loaded290% or more is reduced, first
Alkane reduces 70%, and propylene increases by 300%, and ethylene increases by 150%, O2Increase by 22.25%.Methane has fired bond mechanism more
In detail, oxidation reaction is carried out mainly along following chain reaction path, CH4→CH3·→CH2O→CHO·→CO→CO2.Its
Middle HCO+O≤> HO+CO is the maximum reaction of thermal discharge, and CO converts CO2Primitive is slower compared to other reactions[23], aluminium alloy resistance
CH is prevented every explosion-proof lamp4→CH3The generation of reaction promotes the disappearance of free radical, and chain causes and chain transmitting is interrupted, portion
Divide methane that can not participate in reacting.Same propane also has similar reaction, C3H8→ C2H5·+CH3·→CH2O→CHO·→CO
→CO2, load aluminium alloy block blast-proof materials and prevent C3H8→ C2H5·+CH3, and the disappearance of free radical is promoted, it hinders
Alkyl oxidation and CO, CO2It generates, O2It can not participate in reacting, CO, CO can be explained2It significantly reduces, O2Content increases.It has occurred simultaneously
CH3·+H·→CH4、CH3·→ CH2·+H·、2CH2·→C2H4、C2H5·→C2H4·+H·、C2H4·+CH2·→
C3H6, etc. gas phases and avoid reacting, free radical is destroyed by aluminium alloy block blast-proof materials, and methane can not generate, and content is reduced, first
The combination such as base and methylene, generates ethylene and propylene, and content increases.Detonation pressure peak and explosion maximum temperature and gas molar
Number is positively correlated[24], aluminium alloy block blast-proof materials honeycomb structure hinder chain reaction carry out, reduce the chain of methane and propane
Cause and chain transmits, and accelerate chain termination, causes reaction incomplete.Deducibility aluminium alloy block blast-proof materials reduces hydro carbons
Substance is to CO, CO2Oxidation process, heat release reduces, and reaction can not transmit.Honeycomb structure accelerate again gas phase destroy and
It avoids destroying, causes hydrocarbons that can not convert, delay increases, and the molal quantity of stopped reaction process, generation is less, causes final
Detonation pressure peak occurs and reduces in advance.
The method analyzed by explosion product, explains the explosion suppression mechanism of block blast-proof materials.Propane explosion product ingredient
Analysis provides data support for the research of propane explosion mechanism, but since current composition measurement is more inconvenient, for this method
Popularization and application still there are many work to do.
Three, conclusion
To methane air premixed gas and the monitoring of Propane-air premixed gas blast pressure and product analysis, pressure can be explained
Power surge pressure change the reason of and to part reaction mechanism, show that gas burst product analysis can be used as flammable gas explosion
The analysis method of characteristic has expanded the research mode of blast characteristics, has important reference significance to explosion mechanism research.
Alkane residual volume, which accounts for, after methane and propane explosion participates in 13% or more reaction gas, illustrates aluminium alloy Separated explosion-proof material
Material prevents reaction chain from causing and develop, and accelerates chain termination, leads to reaction not exclusively, and heat release is incomplete, causes pressure peak
Reduction.
After propane loads aluminium alloy block blast-proof materials, CO and CO in explosion product2Volume fraction reduces 90% or more,
It generates hydro carbons to increase, illustrates the material interruption response path, influence hydro carbons chain reaction process, cause intermediate accumulation, hinder
Final product CO and CO2It generates, causes heat release to be not thorough and reduced with number of moles of gas, detonation pressure peak reduces.Propane
Explosion product can be used as the foundation of its reaction mechanism analysis.
In flammable gas explosion characteristic research, using modern instrumental analysis method, analyze explosion product ingredient and its
Content can indirectly speculate explosive reaction path, and the difference of pressure peak under different condition can be effectively explained with this.For combustible gas
The research of body blast characteristics provides a kind of except pressure test, temperature test, and one outside the tradition research method such as flame image shooting
Kind of new method, the new method closer in explosive reaction itself, be more conducive to finding the technology for inhibiting flammable gas explosion and
Means.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Within the technical scope of the present disclosure, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims
Subject to enclosing.
Claims (8)
1. a kind of gas burst experimental provision based on product analysis, which is characterized in that including flammable premixed gas body explosion pipeline,
Transient pressure acquisition system and ignition system；
The ignition system is connect with the ignitor for being set to flammable premixed gas body explosion pipeline one end；
The transient pressure acquisition system and computer and the transient pressure on flammable premixed gas body explosion duct wall pass
Sensor connection；
The flammable premixed gas body explosion pipeline is closed rectangular or circular pipe；
The flammable premixed gas body explosion pipeline is provided with block blast-proof materials, or is not filled with material；
The flammable premixed gas body explosion pipeline is connected with circulating pump, fuel gas steel cylinder and tail gas collecting device.
2. the gas burst experimental provision according to claim 1 based on product analysis, which is characterized in that the ignition power
Pole includes high-energy ignition instrument and igniter head, and between ignition energy 1-1000mJ, ignition energy is controllable.
3. the gas burst experimental provision according to claim 1 based on product analysis, which is characterized in that the pressure passes
Sensor includes transient pressure sensor, and frequency acquisition is 200-40 times/ms, and surveying pressure range is 0~5MPa.
4. the gas burst experimental provision according to claim 1 based on product analysis, which is characterized in that the premix can
The size of combustion gas body explosion pipeline are as follows: length 500mm, diameter wide 60mm, wall thickness 6mm, designing maximum pressure-bearing is 10MPa.
5. the gas burst experimental provision according to claim 1 based on product analysis, which is characterized in that the barrier is anti-
Quick-fried material is aluminium alloy block blast-proof materials or Nonmetal barrier explosion-proof material.
6. the gas burst experimental provision according to claim 1 based on product analysis, which is characterized in that the premix can
Combustion gas body is that methane air premixed gas concentration is 5-15%V/V and Propane-air premixed gas concentration is 2.1-9.5%V/
V。
7. a kind of gas burst experimental provision as claimed in any one of claims 1 to 6 based on product analysis carries out gas burst
The method of experiment, which is characterized in that comprising steps of
A, aluminium alloy block blast-proof materials is rolled into column, with ultrasonic cleaning ten minutes, is packed into after dry in explosion pipeline,
Pipeline igniter head end leaves a blank 5%, and effectively to light a fire, remaining space uniform of experimental channel loads block blast-proof materials, returns dress
Good sealing cover；
B, intake valve, valve two are closed, air outlet valve and valve one are opened, opens circulating pump, air in pipeline is extracted out, utilizes pressure
Table tests device, it is ensured that has good air-tightness under pipeline 0.1MPa negative pressure；
C, pipeline inner part air is extracted out using circulating pump, make the negative pressure for forming 0.07MPa in pipeline, close air outlet valve, valve
Two, valve three and intake valve are opened, the fuel gas of calculation amount volume is accurately injected into pipeline, and fill into air into pipeline
It is allowed to form normal pressure；
D, valve one and valve three are closed, valve two, intake valve and air outlet valve are opened, opens circulating pump, gas in circulating line
Five minutes, stand five minutes；
E, point fights and acquires blast pressure data: setting ignition energy is 500mJ, cracking pressure sensing system, and discharge igniting is adopted
Collect pressure data；
F, after explosion, air outlet valve and valve one are opened, closes valve two and intake valve, the interface connection product at valve two
Collection device, the tail gas after collecting explosion carry out the detection and analysis of product component using gas chromatographicanalyzer, mass spectrograph.
8. the gas burst experimental method according to claim 7 based on product analysis, which is characterized in that carry out following appoint
A kind of experiment and its data and analysis: the explosion test of 5-15%V/V methane air premixed gas, 2.1-9.5%V/V propane-
Air pre-mixing gas burst experiment.
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