CN110174439A - A kind of interior experimental provision for generating hydrogen longitudinal direction concentration gradient of enclosure - Google Patents
A kind of interior experimental provision for generating hydrogen longitudinal direction concentration gradient of enclosure Download PDFInfo
- Publication number
- CN110174439A CN110174439A CN201910307897.5A CN201910307897A CN110174439A CN 110174439 A CN110174439 A CN 110174439A CN 201910307897 A CN201910307897 A CN 201910307897A CN 110174439 A CN110174439 A CN 110174439A
- Authority
- CN
- China
- Prior art keywords
- hydrogen
- enclosure
- air
- gas
- valve
- 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.)
- Granted
Links
Classifications
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The present invention relates to the experimental provisions that hydrogen longitudinal direction concentration gradient is generated in a kind of enclosure.Including enclosure, air accumulator, valve actuating mechanism and data collecting mechanism；Spray head is laid at the top of enclosure, one side is from top to bottom laid with gas concentration sensor, and lower part is equipped with gas vent；Valve actuating mechanism includes gas-distribution pipe, vacuum pump, hydrogen gas tank and air tank；Data gather computer structure includes data module and computer.When experiment, enclosure lower exhaust port and top showerhead are opened, hydrogen is uniformly sprayed into, original air discharge, makes to remain an atmospheric pressure in cabin in cabin；Gas vent is closed, hydrogen diffuses to form longitudinal density of hydrogen gradient in cabin；Gas concentration sensor detects the real-time oxygen concentration of different location, and since air pressure remains unchanged in cabin, increased density of hydrogen is reduced oxygen concentration.The present invention compensates for the blank of enclosure fuel gas longitudinal direction concentration gradient research in the research of gas fuel burning blast characteristics.
Description
Technical field
The present invention relates to hydric safes to utilize technical field, and concentration ladder in combustible gas longitudinal direction is realized specifically in enclosed experiment cabin
Spend and carry out to the gradient experimental provision of real-time monitoring.
Background technique
Currently, the energy ensure growth of the national economic, promote social progress and in terms of play
Positive effect, but based on energy scarcity, excessively rely on for counsel fossil energy and fossil energy have it is non-renewable etc., it
Become the important restriction factor of economic development again, and environmental protection is caused stress, therefore the energy saving and new energy of development and utilization
Source has become the real project that the new period economy of energy faces.Hydrogen as energy source possesses as one of emerging energy in recent years
Huge potentiality and wide prospect have obtained increasingly extensive attention and application.Hydrogen is as new energy, safety
It attracts wide attention, hydrogen explosion limit range is very wide, and the unit volume explosion height that releases energy can be made once lighting
At huge economic loss and casualties.Due to the density very little of hydrogen, hydrogen can float in mixture when leaking
The top in space mixes and uneven, and is very likely to and forms certain concentration gradient in space, this to have concentration gradient
Mixture once encounter incendiary source and explode, be likely to result in more huge destruction.
Now for, with the hydrogen explosion of concentration gradient, research both domestic and external is relatively fewer, especially in enclosure space
Experiment aspect, it is domestic to carry out relevant experimental study almost without to the hydrogen explosion with concentration gradient.Currently, the country is not
Have and can be realized the experimental provision that hydrogen in enclosure space has concentration gradient and carries out real-time monitoring to hydrogen gradient, therefore,
It is badly in need of researching and developing a kind of experiment dress for realizing hydrogen longitudinal direction concentration gradient in enclosed experiment cabin and carry out the gradient real-time monitoring
It sets, to be contrasted in different mean concentrations, different hydrogen gradient and uniform situation, studies its shadow to explosive flame and pressure
It rings.
Summary of the invention
A kind of interior experimental provision for generating hydrogen longitudinal direction concentration gradient of enclosure, solves to lack in existing experimental provision and grind
Study carefully the blank of the hydrogen explosion research experiment device with concentration gradient.
It includes enclosure 15, air accumulator 14, distribution that the experimental provision of hydrogen longitudinal direction concentration gradient is generated in a kind of enclosure
Mechanism and data collecting mechanism；
The top of the enclosure 15 is laid with more than four spray heads 21；The spout of each spray head 21 is located at enclosure
In 15, the input end of spray head 21 is connected to air accumulator 14 with air jet pipe by solenoid valve 13；The spray of side is connected to enclosure 15
Tracheae is equipped with snifting valve 12；Three or more gas concentration sensors are from top to bottom laid on the side of the enclosure 15
16, lower part is additionally provided with gas vent 17；
The air accumulator 14 is equipped with pressure gauge；
The valve actuating mechanism includes gas-distribution pipe 3, vacuum pump 7, hydrogen gas tank 1 and air tank 2；
The gas-distribution pipe 3 is equipped with pressure gauge 6, vacuum nozzle, air distribution mouth, hydrogen air distribution port, air intlet and hydrogen
Gas import；The vacuum port of the vacuum pump 7 is connected to vacuum nozzle, and vacuum nozzle is equipped with vacuum control valve 20；It is described
Air distribution mouth is connected to the side surface upper part of enclosure 15 by air distribution pipe 9, and air distribution mouth is equipped with air distribution valve
8；The hydrogen air distribution port is connected to the top of air accumulator 14 by hydrogen gas-distribution pipe 11, and hydrogen air distribution port is equipped with hydrogen distribution
Valve 10；The hydrogen inlet is connected to hydrogen gas tank 1 by pipeline, and hydrogen inlet is equipped with hydrogen valve 4；The air intlet passes through
Pipeline is connected to air tank 2, and air intlet is equipped with air valve 5；
The data gather computer structure includes data module 18 and computer 19, and three or more gas concentration sensors 16 pass through
Conducting wire is connected to the signal input part of data module 18, and the signal output end of data module 18 is connected to computer 19 by conducting wire
Signal input part；
When for testing, pure hydrogen is filled in the air accumulator 14, the pressure of hydrogen is 120Kpa in tank；The enclosure
Dry air is filled in 15, the pressure of air is an atmospheric pressure in cabin；It is 2~11Mpa of pressure pure hydrogen in the hydrogen gas tank 1；
It is 2~11Mpa of pressure dry air in the air tank 2；
When experiment, the exhaust outlet 17 of 15 lower part of enclosure is opened；The solenoid valve 13 on more than four spray heads 21 is opened, it will
Hydrogen is uniformly sprayed into from the top of enclosure 15, and original air can be discharged from gas vent 17 in cabin, makes to remain one in cabin
Atmospheric pressure is constant；Gas vent 17 is closed, hydrogen is diffused in the longitudinal density of hydrogen gradient formed in cabin from top to bottom；Three or more
Gas concentration sensor 16 detects the real-time oxygen concentration of different location, since air pressure remains unchanged in cabin, increased density of hydrogen
The as oxygen concentration of reduction.
The technical solution further limited is as follows:
The enclosure 15 is the cube that side length is 0.5m, and the face of front and back four is stainless steel plate up and down, and left and right two sides is
The quartz glass of 4cm thickness, top are laid with six spray heads 21, and wherein two spray head 21 is uniformly located at middle part, four additional
It is located at four, the top angle of enclosure 15.
Five gas concentration sensors 16 are from top to bottom laid on the side of the enclosure 15.
10cm, the gas concentration sensor and enclosure 15 of the top are divided between adjacent gas concentration sensor 16
The distance between top surface 5cm, the lowermost gas concentration sensor 16 and enclosure 15 the distance between bottom surface 5cm.
The volume of the enclosure 15 is 125L, and the volume of the air accumulator 14 is 200L, and the volume of the gas-distribution pipe 3 is
3L。
The diameter of the gas-distribution pipe 3 is 6cm, length 1m.
The compressive resistance of the enclosure 15 is 2Mpa, and the compressive resistance of the air accumulator 14 is 0.84Mpa, the distribution
The compressive resistance of pipe 3 is 2Mpa.
The snifting valve 12 is ball valve.
The hydrogen valve 4, air valve 5, air distribution valve 8, hydrogen distributing valve 10 and vacuum control valve 20 are needle-valve.
The working principle of the invention is described as follows:
Hydrogen is uniformly sprayed into from the top of enclosure 15, and fine and close geocorona is formed at the top of enclosure 15, due to envelope
The lower part for closing cabin 15 is provided with gas vent 17, and original air can be discharged from gas vent 17 in cabin, makes to remain one big in cabin
Air pressure is constant, and after gas to be painted, gas vent 17 is closed, and as hydrogen is spread, longitudinal direction from top to bottom can be formed in cabin
Density of hydrogen gradient.Three or more oxygen gas concentration sensors 16 detect the real-time oxygen concentration of different location, due to gas in cabin
Pressure remains unchanged, and density of hydrogen increases, and oxygen concentration will be reduced, and increased density of hydrogen is reduced oxygen concentration,
Therefore the density of hydrogen of different location can be calculated with following formula:
CHydrogen=20.9%-COxygen
Wherein, CHydrogenFor the density of hydrogen of the position；COxygenFor the oxygen concentration of the position.
It can control the time of solenoid valve opening by the way that electronic relay is arranged, by multiple debugging and calculating, discovery
In the case that the time that initial pressure and solenoid valve in air accumulator 14 are opened is certain, the air pressure decline in air accumulator 14 is almost
It is constant, therefore, it is determined that it is certain for spraying into the amount of the hydrogen of enclosure 15, and is closed in the case that the two primary condition determine
Average hydrogen concentration can be calculated by following formula in cabin 15:
Wherein, C?For the mean concentration for the cabin hydrogen that explodes；
PJustFor initial hydrogen pressure in air accumulator；
PEventuallyFor the Hydrogen Vapor Pressure after jet in air accumulator；
Ve is the volume of enclosure；
Vs is the volume of air accumulator.
Advantageous effects of the invention embody in the following areas:
1. the present invention is for the fuel gas combustion under various concentration gradient, different fuel gas types, different mean concentrations
The fried characteristic research of decrepitate is revealed to form concentration gradient mixture explosion peace for fuel gas in practical closing or hemi-closure space
Full research provides reference.The present invention compensates for the blank of enclosure fuel gas longitudinal direction concentration gradient research, and subsequent experiment is ground
Theoretical foundation and basic data will be provided for industrial explosion accident investigation by studying carefully, and be provided for places such as hazardous chemical workshop, tunnels
Explosion-proof, explosion-suppressing method promotes the safe utilization of the energy, has great importance.
2. operation of the present invention is convenient, compressive resistance is high, and experimental gas can be discharged in the vacuum pump of setting at any time, and safety can
By property height, and the empirical average concentration of demand can be reached by adjusting two variables of air accumulator initial pressure and jet time, it is real
Existing Multivariable Experimental.
3. the present invention can flammable gas concentration variation in real-time monitoring enclosure, monitoring teachings are 0-100%, side wall
Observation window can observe inner case variation at any time, adjust.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is that hydrogen mean concentration of the present invention is the 12% concentration gradient variation diagram formed；
Fig. 3 is that hydrogen mean concentration of the present invention is the 22% concentration gradient variation diagram formed；
Fig. 4 is that hydrogen mean concentration of the present invention is the 35% concentration gradient variation diagram formed；
Fig. 5 is that methane mean concentration of the present invention is the 9.5% concentration gradient variation diagram formed；
Serial number in upper figure: hydrogen gas tank 1, air tank 2, gas-distribution pipe 3, hydrogen valve 4, air valve 5, pressure gauge 6, vacuum pump 7, sky
Gas distributing valve 8, air distribution pipe 9, hydrogen distributing valve 10, hydrogen gas-distribution pipe 11, snifting valve 12, solenoid valve 13, air accumulator 14, envelope
Close cabin 15, gas concentration sensor 16, exhaust outlet 17, data module 18, computer 19, vacuum control valve 20, jet spray head 21.
Specific embodiment
With reference to the accompanying drawing, the present invention is further described by embodiment.
Referring to Fig. 1, the experimental provision that hydrogen longitudinal direction concentration gradient is generated in a kind of enclosure includes enclosure 15, air accumulator
14, valve actuating mechanism and data collecting mechanism.
Enclosure 15 is the cube that side length is 0.5m, and the face of front and back four is stainless steel plate up and down, and left and right two sides is 4cm thick
The quartz glass of degree, the volume of enclosure 15 is 125L, compressive resistance 2Mpa.There are six the top of enclosure 15 is uniformly installed
Spray head 21, wherein two spray head 21 are uniformly located at middle part, and four additional is located at four, the top angle of enclosure 15.Each
The spout of spray head 21 is located in enclosure 15, and the input end of spray head 21 is connected to air accumulator 14 with air jet pipe by solenoid valve 13,
The volume of air accumulator 14 is 200L, compressive resistance 0.84Mpa, is equipped with pressure gauge on air accumulator 14；It is connected to enclosure 15
Snifting valve 12 is installed on the air jet pipe of side.There are five gas concentrations for uniformly distributed installation from top to bottom on the one side of enclosure 15
Sensor 16, between adjacent gas concentration sensor 16 between be divided into 10cm, the gas concentration sensor and enclosure of the top
The distance between the bottom surface of the distance between 15 top surface 5cm, the lowermost gas concentration sensor 16 and enclosure 15 5cm.
Lower part is also provided with gas vent 17.
Valve actuating mechanism includes gas-distribution pipe 3, vacuum pump 7, hydrogen gas tank 1 and air tank 2.The volume of gas-distribution pipe 3 is 3L, and diameter is
6cm, length 1m, compressive resistance 2Mpa.
Pressure gauge 6, vacuum nozzle, air distribution mouth, hydrogen air distribution port, air intlet and hydrogen are installed on gas-distribution pipe 3
Import.The vacuum port of vacuum pump 7 is connected to vacuum nozzle, and vacuum control valve 20 is equipped on vacuum nozzle.Air distribution
Mouth is connected to the side surface upper part of enclosure 15 by air distribution pipe 9, is equipped with air distribution valve 8 on air distribution mouth.Hydrogen
Air distribution port is connected to the top of air accumulator 14 by hydrogen gas-distribution pipe 11, is equipped with hydrogen distributing valve 10 on hydrogen air distribution port.Hydrogen
Gas import is connected to hydrogen gas tank 1 by pipeline, and hydrogen valve 4 is equipped on hydrogen inlet.Air intlet is connected to sky by pipeline
Gas tank 2 is equipped with air valve 5 on air intlet.
Above-mentioned snifting valve 12 is ball valve, hydrogen valve 4, air valve 5, air distribution valve 8, hydrogen distributing valve 10 and vacuum control
Valve 20 is needle-valve.
Data gather computer structure includes data module 18 and computer 19, and five gas concentration sensors 16 are connected by conducting wire
The signal input part of data module 18, the signal that the signal output end of data module 18 is connected to computer 19 by conducting wire it is defeated
Enter end.
When for testing, pure hydrogen is filled in air accumulator 14, the pressure of hydrogen is 120Kpa in tank；In the enclosure 15
It is filled with dry air, the pressure of air is an atmospheric pressure in cabin；It is 2~11Mpa of pressure pure hydrogen in the hydrogen gas tank 1；It is described
It is 2~11Mpa of pressure dry air in air tank 2.
Below with reference to this experimental provision, actual functional capability of the invention is shown by 4 embodiments:
Embodiment 1
Electronic relay is set and controls opening 13 time of solenoid valve as 3s, 14 initial pressure of air accumulator is 120Kpa, is obtained
Hydrogen mean concentration 12% is embodiment, and steps are as follows for specific experiment:
(1) it before testing, conscientiously checks that each equipment is in shape, is familiar with experimental principle, and pass to oxygen gas concentration
Sensor 16 is calibrated；
(2) air in air accumulator 14 is drawn to vacuum state using the vacuum pump of air distribution system 7, passes through hydrogen immediately
Tank 1, gas-distribution pipe 3, hydrogen gas valve 4, hydrogen distributing valve 10 and hydrogen gas distribution pipeline 11 are filled with pure hydrogen into air accumulator 14, make
The pressure of hydrogen is 120Kpa in tank；
(3) air in enclosure 15 is drawn to vacuum state using the vacuum pump of air distribution system 7, passes through air immediately
Tank, gas-distribution pipe 3, air inlet valve 5, air distribution valve 8 and air distribution pipeline 9 are filled with dry air into enclosure 15, make to seal
The pressure for closing air in cabin 15 is an atmospheric pressure；
(4) exhaust outlet 17 of 15 one side lower part of enclosure is opened；
(5) 6 hydrogen snifting valves 12 around 14 tank body of air accumulator are opened, jet time is set as 3s, opens six sprays
Solenoid valve 13 on first 21 uniformly sprays into hydrogen from the top of enclosure 15, and original air can be discharged from gas vent 17 in cabin,
Make to remain that an atmospheric pressure is constant in cabin；
(6) after jet, enclosure exhaust outlet 17 is blocked rapidly extremely with plug, simultaneously closes off air accumulator 14 tank body week
The hydrogen snifting valve 12 enclosed；
(7) the instant data that observation oxygen gas concentration sensor 16 measures, record the oxygen of 5min on a computer 19
Concentration data, and save in time；
(8) it after completing a density of hydrogen gradient experiment, repeats experiment and carries out error analysis or change initial air accumulator 14
In hydrogen first pressing, tested next time.
It was found that, fore-and-aft distance is larger in this experimental provision, and after up to the free diffusing of 5min, container
Interior mixture still can not substantially uniformity, after 5min, although diffusion is still continuing, the variation of the density of hydrogen of each position is very
Slowly, this concentration gradient can be all kept in very long following period of time, enclosure 15.Here after being given at jet
The density of hydrogen gradient at tetra- moment of 1min, 2min, 3min and 4min, as shown in Figure 2.Enclosure 15 is opened close to the position of top surface
Density of hydrogen highest when the beginning, concentration are 35% or so, and density of hydrogen is minimum when starting close to the position of bottom surface, concentration 0.5%
Left and right.And as diffusion time increases, the position density of hydrogen on top is constantly reduced, and is reduced to 22% when to 4min, and bottom end
Density of hydrogen constantly increase, when 4min, is increased to 2%, and the density of hydrogen of bottom increases slow.
Embodiment 2
Changing the initial hydrogen pressure in air accumulator 14, distribution makes the initial hydrogen pressure 130Kpa in air accumulator 14,
The time that opening solenoid valve 13 is arranged still is 3s, using experimental procedure identical with embodiment (1), has obtained hydrogen mean concentration
For 22% concentration gradient, as shown in figure 3,15 inner top density of hydrogen highest of enclosure, is 38% or so, bottom density of hydrogen
It is minimum, it is 6% or so, as diffusion time increases, the density of hydrogen of apical position is constantly reduced, and when 4min is reduced to 30%,
And the density of hydrogen of bottom position constantly increases, 4min is increased to 10%, obtains and embodiment (1) similar conclusion.
Embodiment 3
Changing the initial hydrogen pressure in air accumulator 14, distribution makes the initial hydrogen pressure 130Kpa in air accumulator 14,
The time that opening solenoid valve 13 is arranged still is 3s, and using experimental procedure identical with embodiment (1), having obtained mean concentration is
35% density of hydrogen gradient, as shown in figure 4, the density of hydrogen variation tendency in figure is similar with embodiment (1) (2), closing
Highest density of hydrogen and minimum density of hydrogen constantly increase, maximum concentration range exists with the increase of mean concentration in cabin 15
Between 40%~46%, minimum concentration range is between 13%~18%.
Embodiment 4
Present invention could apply to different fuel gas, obtain required concentration gradient, combustible gas used in the present embodiment
For methane, the related concentrations of methane gas calculate the calculating formula that can refer to density of hydrogen, and the time that solenoid valve 13 is opened in setting is
1s, distribution make the methane initial pressure 120Kpa in air accumulator, will be flammable using experimental procedure identical with embodiment (1)
Gas is changed to methane gas, the concentration gradient that average concentration of methane gas is 9.5% is obtained, as shown in figure 5, can see in figure
Out, 15 inner top concentration of methane gas highest of enclosure, for maximum concentration 12.5% or so, bottom concentration of methane gas is minimum,
Minimum concentration is 6.5% or so, and as diffusion time increases, the concentration of methane gas of apical position is constantly reduced, and when 4min drops
Down to 11%, and the concentration of methane gas of bottom position constantly increases, and when 4min rises to 8.5%, for hydrogen, first
Alkane gas increasingly tends to uniformly, show methane diffusion velocity faster as diffusion time increases.
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 (9)
1. generating the experimental provision of hydrogen longitudinal direction concentration gradient in a kind of enclosure, it is characterised in that: including enclosure (15), storage
Gas tank (14), valve actuating mechanism and data collecting mechanism；
More than four spray heads (21) are laid at the top of the enclosure (15)；The spout of each spray head (21) is located at closing
In cabin (15), the input end of spray head (21) is connected to air accumulator (14) with air jet pipe by solenoid valve (13)；With enclosure (15)
The air jet pipe for being connected to side is equipped with snifting valve (12)；Three are from top to bottom laid on the one side of the enclosure (15)
The above gas concentration sensor (16), lower part are additionally provided with gas vent (17)；
The air accumulator (14) is equipped with pressure gauge；
The valve actuating mechanism includes gas-distribution pipe (3), vacuum pump (7), hydrogen gas tank (1) and air tank (2)；
The gas-distribution pipe (3) is equipped with pressure gauge (6), vacuum nozzle, air distribution mouth, hydrogen air distribution port, air intlet and hydrogen
Gas import；The vacuum port of the vacuum pump (7) is connected to vacuum nozzle, and vacuum nozzle is equipped with vacuum control valve (20)；
The air distribution mouth is connected to the side surface upper part of enclosure (15) by air distribution pipe (9), and air distribution mouth is equipped with sky
Gas distributing valve (8)；The hydrogen air distribution port is connected to the top of air accumulator (14), hydrogen air distribution port by hydrogen gas-distribution pipe (11)
It is equipped with hydrogen distributing valve (10)；The hydrogen inlet is connected to hydrogen gas tank (1) by pipeline, and hydrogen inlet is equipped with hydrogen valve
(4)；The air intlet is connected to air tank (2) by pipeline, and air intlet is equipped with air valve (5)；
The data gather computer structure includes data module (18) and computer (19), and three or more gas concentration sensors (16) are logical
The signal input part that conducting wire is connected to data module (18) is crossed, the signal output end of data module (18) is connected to count by conducting wire
The signal input part of calculation machine (19)；
When for testing, it is filled with pure hydrogen in the air accumulator (14), the pressure of hydrogen is 120Kpa in tank；The enclosure
(15) it is filled with dry air in, the pressure of air is an atmospheric pressure in cabin；It is the pure hydrogen of 2~11Mpa of pressure in the hydrogen gas tank (1)
Gas；It is 2~11Mpa of pressure dry air in the air tank (2)；
When experiment, the exhaust outlet (17) of enclosure (15) lower part is opened；Open the solenoid valve on more than four spray heads (21)
(13), hydrogen is uniformly sprayed into from the top of enclosure (15), original air can be discharged from gas vent (17) in cabin, make to begin in cabin
Keep an atmospheric pressure constant eventually；It closes gas vent (17), hydrogen is diffused in the longitudinal density of hydrogen formed in cabin from top to bottom
Gradient；Three or more gas concentration sensors (16) detect the real-time oxygen concentration of different location, since air pressure remains unchanged in cabin,
Increased density of hydrogen is reduced oxygen concentration.
2. generating the experimental provision of hydrogen longitudinal direction concentration gradient in a kind of enclosure according to claim 1, feature exists
In: the enclosure (15) is the cube that side length is 0.5m, and the face of front and back four is stainless steel plate up and down, and left and right two sides is 4cm
The quartz glass of thickness, top are laid with six spray heads (21), and wherein two spray head (21) is uniformly located at middle part, four additional
It is located at four, the top angle of enclosure (15).
3. generating the experimental provision of hydrogen longitudinal direction concentration gradient in a kind of enclosure according to claim 1, feature exists
In: five gas concentration sensors (16) are from top to bottom laid on the side of the enclosure (15).
4. generating the experimental provision of hydrogen longitudinal direction concentration gradient in a kind of enclosure according to claim 1, feature exists
In: 10cm, the gas concentration sensor and enclosure (15) of the top are divided between adjacent gas concentration sensor (16)
The distance between the distance between top surface 5cm, the lowermost gas concentration sensor (16) and the bottom surface of enclosure (15)
5cm。
5. generating the experimental provision of hydrogen longitudinal direction concentration gradient in a kind of enclosure according to claim 1, feature exists
In: the volume of the enclosure (15) is 1000L, and the volume of the air accumulator (14) is 200L, the volume of the gas-distribution pipe (3)
For 3L.
6. generating the experimental provision of hydrogen longitudinal direction concentration gradient in a kind of enclosure according to claim 5, feature exists
In: the diameter of the gas-distribution pipe (3) is 6cm, length 1m.
7. generating the experimental provision of hydrogen longitudinal direction concentration gradient in a kind of enclosure according to claim 1, feature exists
In: the compressive resistance of the enclosure (15) is 2Mpa, and the compressive resistance of the air accumulator (14) is 0.84Mpa, the distribution
The compressive resistance for managing (3) is 2Mpa.
8. generating the experimental provision of hydrogen longitudinal direction concentration gradient in a kind of enclosure according to claim 1, feature exists
In: the snifting valve (12) is ball valve.
9. generating the experimental provision of hydrogen longitudinal direction concentration gradient in a kind of enclosure according to claim 1, feature exists
In: the hydrogen valve (4), air valve (5), air distribution valve (8), hydrogen distributing valve (10) and vacuum control valve (20) they are needle
Valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910307897.5A CN110174439B (en) | 2019-04-17 | 2019-04-17 | Experimental device for generate hydrogen longitudinal concentration gradient in closed cabin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910307897.5A CN110174439B (en) | 2019-04-17 | 2019-04-17 | Experimental device for generate hydrogen longitudinal concentration gradient in closed cabin |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110174439A true CN110174439A (en) | 2019-08-27 |
| CN110174439B CN110174439B (en) | 2022-01-11 |
Family
ID=67689511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910307897.5A Active CN110174439B (en) | 2019-04-17 | 2019-04-17 | Experimental device for generate hydrogen longitudinal concentration gradient in closed cabin |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110174439B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113125638A (en) * | 2021-03-08 | 2021-07-16 | 佛山仙湖实验室 | Hydrogen concentration sensor capability test device |
| CN115824894A (en) * | 2022-12-21 | 2023-03-21 | 南通辰聚电子科技有限公司 | Experimental device and experimental method for researching natural gas leakage diffusion law in limited space |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994006571A1 (en) * | 1992-09-22 | 1994-03-31 | Genus, Inc. | Film uniformity by selective pressure gradient control |
| JP2003302171A (en) * | 2002-04-09 | 2003-10-24 | Murata Mfg Co Ltd | Heat treatment furnace |
| CN104422713A (en) * | 2013-09-10 | 2015-03-18 | 冉骏 | Underground coal mine gas explosion reaction test device |
| CN107219258A (en) * | 2017-07-25 | 2017-09-29 | 公安部天津消防研究所 | A kind of restricted clearance fires simulation and elongnated building, datonation-inhibition experiment porch and method |
| CN108802100A (en) * | 2018-06-11 | 2018-11-13 | 公安部天津消防研究所 | A kind of flammable gas explosion experimental provision and application method with concentration gradient |
-
2019
- 2019-04-17 CN CN201910307897.5A patent/CN110174439B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994006571A1 (en) * | 1992-09-22 | 1994-03-31 | Genus, Inc. | Film uniformity by selective pressure gradient control |
| JP2003302171A (en) * | 2002-04-09 | 2003-10-24 | Murata Mfg Co Ltd | Heat treatment furnace |
| CN104422713A (en) * | 2013-09-10 | 2015-03-18 | 冉骏 | Underground coal mine gas explosion reaction test device |
| CN107219258A (en) * | 2017-07-25 | 2017-09-29 | 公安部天津消防研究所 | A kind of restricted clearance fires simulation and elongnated building, datonation-inhibition experiment porch and method |
| CN108802100A (en) * | 2018-06-11 | 2018-11-13 | 公安部天津消防研究所 | A kind of flammable gas explosion experimental provision and application method with concentration gradient |
Non-Patent Citations (4)
| Title |
|---|
| L. R. BOECK 等: "Detonation propagation in hydrogen–air mixtures with transverse concentration gradients", 《SHOCK WAVES》 * |
| L. R. BOECK 等: "Flame Acceleration in Hydrogen/Air Mixtures with Concentration Gradients", 《COMBUSTION SCIENCE AND TECHNOLOGY》 * |
| S. KUDRIAKOV 等: "HYDROGEN-AIR DEFLAGRATION IN THE PRESENCE OF LONGITUDINAL CONCENTRATION GRADIENTS", 《PROCEEDINGS OF THE ASME 2013 INTERNATIONAL MECHANICAL ENGINEERING CONGRESS AND EXPOSITION》 * |
| VOLLMER, K. G.等: "Deflagration-to-detonation transition in hydrogen/air mixtures with a concentration gradient", 《COMBUSTION SCIENCE AND TECHNOLOGY》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113125638A (en) * | 2021-03-08 | 2021-07-16 | 佛山仙湖实验室 | Hydrogen concentration sensor capability test device |
| CN115824894A (en) * | 2022-12-21 | 2023-03-21 | 南通辰聚电子科技有限公司 | Experimental device and experimental method for researching natural gas leakage diffusion law in limited space |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110174439B (en) | 2022-01-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111474208B (en) | Simulation experiment and suppression device for gas cloud explosion of non-uniform gradient concentration formed by gas leakage in urban underground pipe gallery cabin | |
| US20200232305A1 (en) | Pressurized test device and method for in-situ mining natural gas hydrates by jets | |
| CN110174439A (en) | A kind of interior experimental provision for generating hydrogen longitudinal direction concentration gradient of enclosure | |
| CN205508246U (en) | Large scale nuclear power conflagration comprehensive experimental platform | |
| CN104391074A (en) | Constant volume combustion bomb and liquid fuel combustion performance testing method | |
| CN105699247A (en) | Experimental method for synthesizing and decomposing natural gas hydrate and experiment system | |
| CN106568887A (en) | Experimental device for research on hydrogen combustion in nuclear power plant containment shell | |
| CN106338401A (en) | Airspace-engine test-bed long-range exhaust system | |
| CN206152657U (en) | Low humidity humidity generating device | |
| CN101683599B (en) | High-precision gas mixing system and method | |
| CN104792650A (en) | Experimental research device for inhibition of evaporation and diffusion of liquefied natural gas by high-expansion foam | |
| CN113834853B (en) | Device and method for testing explosion characteristics of fuel gas in oil-water-gas coexistence limited space | |
| CN214794651U (en) | Mixed fuel combustion test system | |
| CN116255277A (en) | Gas generator test system and method for gas self-pressurization liquid rocket engine | |
| CN201738955U (en) | Explosion alarming device for gas and other combustible gas | |
| CN115191243A (en) | Wheat storage seed protection device, system and storage method | |
| CN208980794U (en) | It is used to prepare the device of silicon chip surface pellumina | |
| CN201740720U (en) | Simple gas collecting pipeline device for imitating corrosion of damp corrosive gas | |
| CN201454431U (en) | High-precision gas mixing device | |
| CN207761828U (en) | Gas/dual fuel engine integral type methane air inlet pipe fuel gas ejecting device | |
| CN114280217A (en) | Aviation fuel oil automatic ignition experimental device and experimental method thereof | |
| CN208717417U (en) | A kind of oily screening arrangement of coating machine | |
| CN206891823U (en) | Emulate haze generator | |
| CN213516964U (en) | Experimental device for influencing explosion characteristics of combustible gas by superfine water mist | |
| CN220983066U (en) | Hot rolling H shaped steel soil corrosion test equipment |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |