CN104749218B - Flammable gas explosion characteristic test device and method under ultralow temperature - Google Patents
Flammable gas explosion characteristic test device and method under ultralow temperature Download PDFInfo
- Publication number
- CN104749218B CN104749218B CN201510140603.6A CN201510140603A CN104749218B CN 104749218 B CN104749218 B CN 104749218B CN 201510140603 A CN201510140603 A CN 201510140603A CN 104749218 B CN104749218 B CN 104749218B
- Authority
- CN
- China
- Prior art keywords
- valve
- gas
- explosive container
- container
- pressure
- 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.)
- Active
Links
Landscapes
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The present invention relates to flammable gas explosion characteristic test device and method under a kind of ultralow temperature, the test device includes a refrigerating plant, and it is 3 to be placed with a draw ratio in the inner cavity of refrigerating plant:Gap is formed between the inner cavity of 1 explosive container, explosive container and refrigerating plant, which is added with the Heat Conduction Material for making the gas in explosive container and explosive container be down to experimental temperature；The top of explosive container is sealed by a blind flange, explosive container is internally provided with two ignitors being connected with ignition energy console, the bottom of explosive container is equipped with the leakage fluid dram for realizing carbon distribution cleaning in explosive container, and the foil gauge of thermal stress in monitoring blast process in real time is posted on the inner wall of explosive container；Blind flange is equipped with temperature sensor, pressure sensor and the air admission hole and gas vent being connected to explosive container inside.Test device of the present invention can eliminate the huge puzzlement of liquid nitrogen usage amount in liquid nitrogen refrigerating, and risk and thermal stress are excessively high caused by avoiding the heat that explosion generates that liquid nitrogen is made quickly to volatilize, high cooling efficiency, disclosure satisfy that the requirement of minimum ignition energy and explosion limit test.
Description
Technical field
The invention belongs to industrial production security technology areas, specifically, flammable gas under being related to a kind of ultra-low temperature surroundings
The test device and method of the characteristics research such as body explosion limit.
Background technology
China's coal bed gas resource rich reserves, development potentiality are huge.Contain the air such as nitrogen oxygen in the coal bed gas now exploited more
Component has explosion hazard.Coal gas gasification is one of main application field of coal bed gas, in carrying for coal gas gasification flow
The pure stage in rectifying column, purifies, oxygen, nitrogen content gradually increase at the top of rectifying column, methane with the gradual liquefaction of methane
Content is relatively low, therefore under the operating mode of rectifying column " cryogenic high pressure ", methane is likely to be within the scope of explosion limit, if meeting remaining heavy hydrocarbon
The fragmentary spark or external heat source that particle and dust collision generate influence, it is possible to cause combustion explosion.Therefore, in order to ensure
The safety of coal gas gasification flow, it is necessary to grasping the explosion poles of the fuel gas under condition of ultralow temperature such as coalbed methane containing oxygen
The changing rule of the parameters such as limit and the pressure in blast process, temperature.Many scholars and technical staff are quick-fried in fuel gas
It is studied in terms of fried characteristic, but its research direction often concentrates under fuel gas normal temperature and pressure or high temperature and high pressure condition,
It is very few for the research for being related to the liquefied worst cold case of fuel gas.
Chinese patent application publication No. CN 102788817A, data of publication of application on November 21st, 2012, the name of innovation and creation
Flammable gas explosion characteristic test research method referred to as under ultra-low temperature surroundings, the patent application disclose following specific features：It is first
First explosion tank body is evacuated；Then fuel gas to be measured is filled with explosion tank body and cooled down；Finally light it is to be measured can
Combustion gas body, and blast characteristics supplemental characteristic in blasting pot body is acquired, and preserve blast characteristics supplemental characteristic.The advantages of invention, exists
In：The invention is directed to flammable gas explosion characteristic test research method under ultra-low temperature surroundings, mainly solves under ultra-low temperature surroundings
The relevant issues such as flammable gas explosion characteristic test system and experiment flow；It is quick-fried that the invention is directed to fuel gas under ultra-low temperature surroundings
The measurement of the fried limit, can also carry out the measurement and reality of the parameters such as ultra-low temperature surroundings Explosion Pressure of Flammable Gases and rate of pressure rise
Test research work；Measurement of the invention mainly for gas utilization cryogenic liquefying technique ultra-low temperature surroundings coal bed gas explosion limit
And the measurement of other industrial fuel gas explosive characteristic parameters under ultra-low temperature surroundings.Disadvantage is that：1. skill of freezing
For art using liquid nitrogen refrigerating, liquid nitrogen is readily volatilized under atmospheric environment so that liquid nitrogen dosage is huge, uneconomical；Fuel gas is quick-fried
It is fried to generate a large amount of heat, it may make liquid nitrogen Quick-gasifying in interlayer that physical explosion be caused to endanger by heat transfer.2. used quick-fried
Fried tank body is 20L, and volume is larger, and the draw ratio of cylindrical explosive container is essentially 1~1.5, it has been investigated that, these knots
The container of structure size chamber wall in blast process will produce prodigious thermal stress.So-called thermal stress is construed to：Gas in blasting pot
Body instant of detonation is completed, and explosion generates a large amount of heat, is transmitted to container inner wall rapidly by thermal convection current and heat radiation so that container
Inner wall temperature rises rapidly, and container outer wall is also in lower temperature so that and container inside and outside wall has larger temperature gradient, to
Prodigious thermal stress is generated in chamber wall, 1000MPa can be up to, be much larger than the allowable stress of material so that container fails, and causes
Prodigious security risk.3. can not accurately be measured to the minimum ignition energy of fuel gas, the especially determination of sensitive condition；
Geometric dimension and explosion for explosive container occur criterion and do not study, can not obtain more accurate explosion limit
Etc. parameters.4. after multiple explosion, container inner wall and ignitor will produce a large amount of carbon distributions, and equipment therefor must be by container
Lid, which is opened, carries out internal cleaning, time-consuming and laborious.5. not providing the detailed process of blast characteristics test.
Invention content
It is an object of the invention to be directed to the existing flammable gas explosion characteristic test existing above problem in the process, provide
Flammable gas explosion characteristic test device and method under a kind of ultralow temperature, the test device can eliminate liquid nitrogen in liquid nitrogen refrigerating
The huge puzzlement of usage amount, risk and thermal stress are excessively high caused by avoiding the heat that explosion generates that liquid nitrogen is made quickly to volatilize, refrigeration effect
Rate is high, disclosure satisfy that the requirement of minimum ignition energy and explosion limit test.
The technical scheme is that：Flammable gas explosion characteristic test device under a kind of ultralow temperature, including a refrigeration dress
It sets, it is 3 to be placed with a draw ratio in the inner cavity of the refrigerating plant:1 explosive container, the explosive container are filled with the refrigeration
Gap is formed between the inner cavity set, which, which is added with, makes the gas in explosive container and explosive container be down to experimental temperature
Heat Conduction Material；The top of the explosive container is sealed by a blind flange, and the explosive container is internally provided with two and ignition energy
The connected ignitor of console is measured, the bottom of the explosive container is equipped with the leakage fluid dram for realizing carbon distribution cleaning in explosive container,
The foil gauge of thermal stress in monitoring blast process in real time is posted on the inner wall of the explosive container；The blind flange is equipped with temperature
Sensor, pressure sensor and the air admission hole and gas vent being connected to explosive container inside.
Further, in above-mentioned test device, a protective cover, the temperature sensor are installed outside the refrigerating plant
It is connected respectively with a data collecting instrument by connecting line with temperature sensor.
Preferably, in above-mentioned test device, the refrigerating plant uses cryogenic testing case, use temperature range
For room temperature~-160 DEG C, the cryogenic testing case inside uses compressor cooling, and refrigerant circulation uses；The ultralow temperature
The RS232 interface that chamber is equipped with touch screen operation interface and is connected with outer end computer.
Preferably, in above-mentioned test device, the explosive container uses 304 stainless steels, size to take internal diameter
100mm, height 300mm are the cylindrical of dischargeable capacity 2.355L, and bottom lock, top uses flange with the blind flange
The form of connection is connected；The design pressure of the explosive container is 45MPa, and the temperature range born is room temperature~-150
℃。
Further, in above-mentioned test device, the ignition energy console is by testing the voltage of ignitor and putting
Electric current obtains the value of minimum ignition energy using integration method, forms electric spark between ignitor and ignites fuel gas, at this point, can
The air pressure resistance 2MPa, the 50MPa of resistance to instantaneous pressure of combustion gas body；Wherein, air pressure resistance 2MPa refers in initial gas (before exploding) pressure
Power is that 2MPa is can to complete to discharge, because with the raising of pressure, electric discharge is more difficult to complete；Instantaneous pressure 50MPa refers to quick-fried
The gas pressure that fried moment generates, ensures not blown up in instant of detonation ignitor；What the ignition energy console generated
Igniting energy storage energy includes meeting the low energy area of fuel gas minimum ignition energy test request under ultralow temperature and meeting explosion pole
Limit the high-energy area of test request.
Further, it in above-mentioned test device, is provided on the blind flange for installing ignitor, temperature sensor
With the installation through-hole of pressure sensor, wherein for installing center of two installation through-holes of ignitor relative to blind flange
Symmetrically.
Further, in above-mentioned test device, the air admission hole is connected with the first interface of a three-way pipe, the three-way pipe
Second interface the safety valve for playing the role of decompression protection is installed, the third interface of the three-way pipe is connected with an air inlet pipe；
The gas vent is connected with an exhaust pipe, and the other end of the exhaust pipe is connected with the first interface of a three-way pipe, the threeway
The second interface of pipe is connected with and sampling valve, and third interface is connected with explosive container blow valve.
Further, it in above-mentioned test device, is sequentially connected between the third interface and the air inlet pipe of the three-way pipe
There are flame arrester for pipe, pressure gauge and flow control valve, the sampling valve to connect a gas chromatograph.
Preferably, in above-mentioned test device, the Heat Conduction Material is aluminium powder；The pressure sensor uses piezoelectricity
Formula sensor, the temperature sensor use thermocouple sensor.
The present invention also provides flammable gas explosion characteristic test method under a kind of ultralow temperature, the dress that is used in test process
It sets including flammable gas explosion characteristic test device under air source, pumped vacuum systems, gas agitating system, ultralow temperature and gas color
Spectrometer, the air source are to be contained with fuel gas and the steel cylinder of compressed air, and the pumped vacuum systems includes vacuum pump and vacuum
Container, the gas agitating system include the stirring container and the magnetic being stirred to gas in stirring container that pressure resistance is 20MPa
Power agitating device；Its test is as follows：
(1) flow purging before testing：It keeps all valves to close, opens air outlet slit main valve V10, the first air outlet valve
V6, gas pressure regulating valve V12, vacuum pumping valve V13, vacuum vent valve V14, mixed gas terminal valve V15, mixed gas blow valve
V17, mixed gas inlet valve V18, flow control valve V19, explosive container blow valve V20, wait at least closing all valves after five minutes
Door；
(2) testing process vacuumizes：Close the first fuel gas outlet valve V2, the second fuel gas outlet valve V3, first
Air outlet valve V6, the second air outlet valve V7, gas blow valve V11, vacuum vent valve V14, mixed gas blow valve V16 and
Explosive container blow valve V20, remaining valve is fully open, opens vacuum pump, when vacuum degree is less than 20Pa in flow, closes institute
There is valve, stops vacuum pump；
(3) method distribution is divided：Open the first fuel gas outlet valve V2, gas pressure regulating valve V12, mixed gas terminal valve
V15 slowly opens fuel gas and exports main valve V9, and after stirring container pressure reaches fuel gas setting value, closing first can
Combustion gas body outlet valve V2 and fuel gas outlet main valve V9；The first air outlet valve V6 is opened, air outlet slit main valve is slowly opened
V10 after container inner pressure to be mixed reaches total pressure set points, closes the first air outlet valve V6, air outlet slit main valve
V10, gas pressure regulating valve V12 and mixed gas terminal valve V15；It opens magnetic stirring apparatus 5 minutes, opens gas chromatograph and connect
Mouth valve V22 carries out gas component measurement by gas chromatograph and records, close gas chromatograph interface valve V22, opens mixing
Gas inlet valve V18, flow control valve V19 slowly open mixed gas terminal valve V15, wait for that pressure reaches in explosive container
All valves are closed after setting value；
(4) freeze：It keeps all valves to close, opens refrigerating plant, to gas refrigeration in explosive container, temperature, which reaches, to be set
Refrigerating plant is closed after definite value；
(5) point, which is fought, records test result：It puts pressure and temperature in fighting record blast process to change with time, carry out
Test of many times is tested, and determines the explosion limit and minimum ignition energy of fuel gas；
(6) pressure release：Blow valve V20 is opened to the air venting in explosive container；
(7) all valves are opened, the operation of step 1-6 is repeated, is tested next time.
The beneficial effects of the invention are as follows：
(1) test device of the present invention is provided with refrigerating plant, and using compressor cooling, refrigerant circulation uses, and temperature is easy
Control, can eliminate the huge puzzlement of liquid nitrogen usage amount in liquid nitrogen refrigerating, avoid the heat that explosion generates that liquid nitrogen is made quickly to volatilize and make
At risk and thermal stress it is excessively high, meanwhile, inner cavity and the explosive container of refrigerating plant fit together, by way of heat transfer
Cooling, high cooling efficiency.
(2) explosive container of the present invention is designed using optimum-size, draw ratio 3:1, the heat that on the one hand explosion generates is answered
Power is no more than 200MPa, is less than the allowable stress of container material, and another aspect container diameter is 100mm, and diameter is sufficiently large, avoids
Influence of the wall effect of chamber wall to blast characteristics data.
(3) foil gauge is posted on explosive container inner wall of the present invention, monitors the thermal stress in blast process in real time, once container
Inner wall thermal stress can stop testing, and no longer carry out test (such as gas of more dangerous working condition immediately close to the allowable stress of material
Body initial temperature is lower or initial pressure higher).
(4) explosive container bottom of the present invention is equipped with leakage fluid dram, and the installation through-hole injection of ignitor is installed from blind flange
Cleaning solution is flowed out from leakage fluid dram, convenient to clear up carbon distribution in explosive container, avoids the inconvenience that dismounting flange cover strip is come.
(5) ignition energy console of the present invention uses low energy area and two, high-energy area shelves, can meet minimum respectively
The requirement of ignition energy and explosion limit test, ignitor electric discharge actual energy can be changed by the voltage and current of oscillograph recording
Curve negotiating integration method calculating accurately obtain, reduce error.
(6) protective cover is installed outside refrigerating plant of the present invention, can with avoiding device just in case occur explosion accident when to work
It is damaged as personnel.
(7) pressure sensor of the present invention uses piezoelectric transducer, cooperation charge amplifier to use, and range 35MPa makes
It it is -240~316 DEG C with temperature, 1649 DEG C of moment high temperature resistant, sample frequency is high, sample frequency >=200kHz, it is ensured that adopt
It is undistorted to collect complete blast pressure waveform；Temperature sensor uses thermocouple sensor, temperature-measuring range -200~1300
DEG C, response time 18ms, pressure-resistant 68MPa.
Description of the drawings
Fig. 1 is the structural schematic diagram of specific embodiment of the invention test device.
Fig. 2 is the vertical view of specific embodiment of the invention test device.
Fig. 3 is each component part during flammable gas explosion characteristic test under specific embodiment of the invention ultra-low temperature surroundings
Between structure connection figure.
Wherein, 1, pressure gauge, 2, flame arrester for pipe, 3, flow control valve, 4, safety valve, 5, explosive container blow valve, 6,
Sampling valve, 7, air admission hole, 8, temperature sensor, 9, explosive container, 10, blind flange, 11, gas vent, 12, pressure sensor, 13,
Super low temperature refrigeration case, 14, ignitor, 15, protective cover, 16, foil gauge, 17, leakage fluid dram, 18, cable, 19, aluminium powder, V1, can
Combustion gas body blow valve, V2, the first fuel gas outlet valve, V3, the second fuel gas outlet valve, V4, fuel gas blow valve,
V5, air vent valve, V6, the first air outlet valve, V7, the second air outlet valve, V8, air vent valve, V9, fuel gas go out
Mouth main valve, V10, air outlet slit main valve, V11, gas blow valve, V12, gas control valve, V13, vacuum pumping valve, V14, vacuum are put
Empty valve, V15, mixed gas terminal valve, V16, mixed gas blow valve, V17, stirring container bleeder valve, V18, mixed gas
Inlet valve, V19, flow control valve, V20, explosive container blow valve, V21, explosive container bleeder valve, V22, gas chromatograph connect
Mouth valve.
Specific implementation mode
Below in conjunction with attached drawing, the invention will be further described.
As shown in Figure 1, flammable gas explosion characteristic test device under a kind of ultralow temperature, including a refrigerating plant, described
It is 3 that the inner cavity of refrigerating plant, which is placed with a draw ratio,:1 explosive container 9, the explosive container 9 are interior with the refrigerating plant
Gap is formed between chamber, which is added with the heat conduction for making the gas in explosive container 9 and explosive container 9 be down to experimental temperature
Material aluminium powder 19；The top of the explosive container 9 is sealed by a blind flange 10, and the explosive container is internally provided with two and point
The connected ignitor 14 of fiery energy hole platform, the bottom of the explosive container 9, which is equipped with, realizes carbon distribution cleaning in explosive container
Leakage fluid dram 17 posts the foil gauge 16 of thermal stress in monitoring blast process in real time on the inner wall of the explosive container 9；The flange
Lid 10 is equipped with temperature sensor 8, pressure sensor 12 and the air admission hole 7 being connected to 9 inside of the explosive container and exhaust
Hole 11.
In the present embodiment, as shown in Figure 1, a protective cover 15 is equipped with outside the refrigerating plant, for preventing burst feelings
Injury of the condition to experimenter, the refrigerating plant use cryogenic testing case 13, use temperature range be room temperature~-
160 DEG C, 13 inside of the cryogenic testing case uses compressor cooling, and refrigerant circulation uses；The cryogenic testing case
13 RS232 interfaces for being equipped with touch screen operation interface and being connected with outer end computer, RS232 interface and outer end computer phase
Even, cryogenic temperature can be carried out on the spot or remote control.
In the present embodiment, the size and 9 appearance and size of explosive container of the cryogenic testing case 13 are almost the same, and explosion is held
Aluminium powder is added in the gap that device 9 is formed with 13 inner cavity of cryogenic testing case, explosive container 9 is made closely to be tied with cryogenic testing case 13
It is combined, to the gas refrigeration of explosive container 9 and its inside in the way of heat transfer.The explosive container 9 uses 304
Stainless steel, size take internal diameter 100mm, height 300mm, are the cylindrical of dischargeable capacity 2.355L, and internal diameter 100mm can be with
Meet the requirement that explosion gas propagates minimum dimension, avoids the occurrence of and avoid quenching phenomenon, draw ratio 3:1, explosion can be met
Thermal stress keeps the temperature fall time of explosive container 9 most short less than under the premise of material allowable stress in the process；The bottom of explosive container 9
Portion closes, and top is connected with the blind flange 10 in the form of flanged joint, and leakproofness is good；The explosive container 9 is set
Meter pressure is 45MPa, and the temperature range born is room temperature~-150 DEG C.
In the present embodiment, the ignition energy console by test ignitor voltage and discharge current, using product
Point-score obtains the value of minimum ignition energy, improves the accuracy of experimental data.The igniting storage that the ignition energy console generates
Energy energy includes meeting the low energy area of fuel gas minimum ignition energy test request under ultralow temperature and meeting explosion limit test
It is required that high-energy area, wherein low energy area 0.08mJ~50mJ and 50mJ~1000mJ is continuously adjustable, and there is 20J in high-energy area
One point, discharge energy are sufficiently large.It forms electric spark between two ignitors to ignite fuel gas, air pressure resistance 2MPa, resistance to moment
Pressure 50MPa, it is ensured that can be worked normally after gas burst.Wherein, air pressure resistance 2MPa refers to (exploding in initial gas
Before) pressure is that 2MPa is can to complete to discharge, because with the raising of pressure, electric discharge is more difficult to complete；Instantaneous pressure 50MPa refers to
It is the gas pressure that instant of detonation generates, ensures not blown up in instant of detonation ignitor.
In the present embodiment, it is provided on the blind flange 10 and is passed for installing ignitor 14, temperature sensor 8 and pressure
The installation through-hole of sensor 12, wherein for installing center pair of two installation through-holes of ignitor 14 relative to blind flange 10
Claim.
In the present embodiment, as shown in Figure 1, the air admission hole 7 is connected with the first interface of a three-way pipe, the three-way pipe
Second interface is equipped with the safety valve 4 for playing the role of decompression protection, when the pressure in explosive container 9 is more than limit value, automatically
Exhaust pressure relief ensures that the safety of test device, the third interface of the three-way pipe are connected with an air inlet pipe；The gas vent 11 with
One exhaust pipe is connected, and the other end of the exhaust pipe is connected with the first interface of a three-way pipe, the second interface of the three-way pipe
It is connected with sampling valve 6, third interface is connected with explosive container blow valve 5, for the high pressure gas after explosion to be passed through blow-down pipe
Discharge in from explosive container 9.
In the present embodiment, be connected in turn between the third interface and the air inlet pipe of the three-way pipe flame arrester for pipe 2,
Pressure gauge 1 and flow control valve 3, the sampling valve 6 connect a gas chromatograph, and sampling valve 6 is to gas sample before explosion, profit
The composition and concentration of gas are analyzed with gas chromatograph.
In the present embodiment, the leakage fluid dram is threaded hole, and when experiment is connected with screw, when the cleaning of explosive container 9 is except carbon,
It is installed from blind flange 10 in the installation through-hole of ignitor 14 and injects cleaning solution, flowed out from threaded hole.
In the present embodiment, the foil gauge 16 is connected by cable 18, monitors 9 inner wall of explosive container in blast process in real time
The variation of thermal stress, to take timely measure guarantee equipment safety.
In the present embodiment, the temperature sensor 8 and pressure sensor 12 pass through connecting line and a data collecting instrument respectively
It is connected, the temperature and pressure parameter of gas in the explosive container 9 of measurement is transmitted to data collecting instrument, realizes Exploding test data
Acquisition.Wherein, the pressure sensor uses piezoelectric transducer, cooperation charge amplifier to use, range 35MPa,
Temperature in use is -240~316 DEG C, 1649 DEG C of moment high temperature resistant, by the simulation to the Explosion Pressure of Flammable Gases rate of climb,
It determines and uses frequency >=200kHz, ensure that gas can be adopted in the period when starting explosion and reaching maximum value to blast pressure
Collection data point more as possible conveniently to rule analyze and determination is quick-fried to completely record blast pressure waveform
It is fried that criterion occurs.The temperature sensor uses thermocouple sensor, temperature-measuring range -200~1300 DEG C, when response
Between 18ms, pressure-resistant 68MPa.
The present invention also provides flammable gas explosion characteristic test methods under a kind of ultralow temperature, as shown in figure 3, test process
The device of middle use includes flammable gas explosion characteristic test device under air source, pumped vacuum systems, gas agitating system, ultralow temperature
And gas chromatograph, the air source are to be contained with fuel gas and the steel cylinder of compressed air, the pumped vacuum systems includes true
Sky pump and vacuum tank, the gas agitating system include pressure resistance be 20MPa stirring container and to gas in stirring container into
The magnetic stirring apparatus of row stirring；Its test is as follows：
(1) flow purging before testing：Keep all valves to close, open air outlet slit main valve V10, gas blow valve V11,
Gas pressure regulating valve V12, vacuum pumping valve V13, vacuum vent valve V14, mixed gas terminal valve V15, mixed gas blow valve
V17, mixed gas inlet valve V18, flow control valve V19, explosive container blow valve V20, wait at least closing all valves after five minutes
Door；
(2) testing process vacuumizes：Close the first fuel gas outlet valve V2, the second fuel gas outlet valve V3, first
Air outlet valve V6, the second air outlet valve V7, gas blow valve V11, vacuum vent valve V14, mixed gas blow valve V16 and
Explosive container blow valve V20, remaining valve is fully open, opens vacuum pump, when vacuum degree is less than 20Pa in flow, closes institute
There is valve, stops vacuum pump；
(3) method distribution is divided：Open the first fuel gas outlet valve V2, gas pressure regulating valve V12, mixed gas terminal valve
V15 slowly opens fuel gas and exports main valve V9, and after stirring container pressure reaches fuel gas setting value, closing first can
Combustion gas body outlet valve V2 and fuel gas outlet main valve V9；The first air outlet valve V6 is opened, air outlet slit main valve is slowly opened
V10 after container inner pressure to be mixed reaches total pressure set points, closes the first air outlet valve V6, air outlet slit main valve
V10, gas pressure regulating valve V12 and mixed gas terminal valve V15；It opens magnetic stirring apparatus 5 minutes, opens gas chromatograph and connect
Mouth valve V22 carries out gas component measurement by gas chromatograph and records, close gas chromatograph interface valve V22, opens mixing
Gas inlet valve V18, flow control valve V19 slowly open mixed gas terminal valve V15, wait for that pressure reaches in explosive container
All valves are closed after setting value；
(4) freeze：It keeps all valves to close, opens refrigerating plant, to gas refrigeration in explosive container, temperature, which reaches, to be set
Refrigerating plant is closed after definite value；
(5) point, which is fought, records test result：It puts pressure and temperature in fighting record blast process to change with time, carry out
Test of many times is tested, and determines the explosion limit and minimum ignition energy of fuel gas；
(6) pressure release：Blow valve V20 is opened to the air venting in explosive container；
(7) all valves are opened, the operation of step 1-6 is repeated, is tested next time.
Embodiment provided above only with illustrating the present invention for convenience, and it is not intended to limit the protection scope of the present invention,
Technical solution scope of the present invention, person of ordinary skill in the field make various simple deformations and modification, should all include
In the above claim.
Claims (9)
1. flammable gas explosion characteristic test device under a kind of ultralow temperature, it is characterised in that：Including a refrigerating plant, in the system
It is 3 that the inner cavity of device for cooling, which is placed with a draw ratio,:1 explosive container, the inner cavity of the explosive container and the refrigerating plant it
Between form gap, which, which is added with, makes the gas in explosive container and explosive container be down to the Heat Conduction Material of experimental temperature,
The Heat Conduction Material is aluminium powder；The top of the explosive container is sealed by a blind flange, and the explosive container is internally provided with two
A ignitor being connected with ignition energy console, the bottom of the explosive container, which is equipped with, realizes carbon distribution cleaning in explosive container
Leakage fluid dram, the foil gauge of thermal stress in monitoring blast process in real time is posted on the inner wall of the explosive container；The blind flange
It is equipped with temperature sensor, pressure sensor and the air admission hole and gas vent being connected to explosive container inside；
It is room temperature~-160 DEG C that the refrigerating plant, which uses cryogenic testing case, use temperature range, the ultralow temperature examination
Compressor cooling is used inside tryoff, and refrigerant circulation uses；The cryogenic testing case is equipped with touch screen operation interface
The RS232 interfaces being connected with outer end computer.
2. flammable gas explosion characteristic test device under ultralow temperature according to claim 1, it is characterised in that：The refrigeration
One protective cover is installed, the temperature sensor and pressure sensor pass through connecting line and a data collecting instrument respectively outside device
It is connected.
3. flammable gas explosion characteristic test device under ultralow temperature according to claim 1, it is characterised in that：Described is quick-fried
Fried container uses 304 stainless steels, size to take internal diameter 100mm, height 300mm, is the cylindrical of dischargeable capacity 2.355L,
Bottom lock, top are connected with the blind flange in the form of flanged joint；The design pressure of the explosive container is
45MPa, the temperature range born are room temperature~-150 DEG C.
4. flammable gas explosion characteristic test device under ultralow temperature according to claim 1, it is characterised in that：The igniting
Energy hole platform by test ignitor voltage and discharge current, using integration method obtain minimum ignition energy value, two
Electric spark is formed between ignitor to ignite fuel gas；The igniting energy storage energy that the ignition energy console generates includes meeting
The low energy area of fuel gas minimum ignition energy test request and the high-energy area for meeting explosion limit test request under ultralow temperature.
5. flammable gas explosion characteristic test device under ultralow temperature according to claim 1, it is characterised in that：The flange
Cover the installation through-hole being provided with for installing ignitor, temperature sensor and pressure sensor, wherein for installing igniting
Central symmetry of two installation through-holes of electrode relative to blind flange.
6. flammable gas explosion characteristic test device under ultralow temperature according to claim 1, it is characterised in that：The air inlet
The first interface of Kong Yuyi three-way pipes is connected, and the second interface of the three-way pipe is equipped with the safety for playing the role of decompression protection
The third interface of valve, the three-way pipe is connected with an air inlet pipe；The gas vent is connected with an exhaust pipe, the exhaust pipe it is another
One end is connected with the first interface of a three-way pipe, and the second interface of the three-way pipe is connected with and sampling valve, the connection of third interface
There is explosive container blow valve.
7. flammable gas explosion characteristic test device under ultralow temperature according to claim 6, it is characterised in that：The threeway
It is connected with flame arrester for pipe, pressure gauge and flow control valve in turn between the third interface and the air inlet pipe of pipe, described takes
Sample valve connects a gas chromatograph.
8. flammable gas explosion characteristic test device under ultralow temperature according to claim 1, it is characterised in that：Described leads
Hot material is aluminium powder；The pressure sensor uses piezoelectric transducer, the temperature sensor to be passed using thermocouple type
Sensor.
9. flammable gas explosion characteristic test method under a kind of ultralow temperature, it is characterised in that：The device packet used in test process
Include flammable gas explosion characteristic test under air source, pumped vacuum systems, gas agitating system, ultralow temperature as described in claim 1
Device and gas chromatograph, the air source are to be contained with fuel gas and the steel cylinder of compressed air, the pumped vacuum systems packet
Vacuum pump and vacuum tank are included, the gas agitating system includes pressure resistance for the stirring container of 20MPa and to gas in stirring container
The magnetic stirring apparatus that body is stirred；Its test is as follows：
(1) flow purging before testing：It keeps all valves to close, opens air outlet slit main valve V10, gas blow valve V11, gas
Pressure regulator valve V12, vacuum pumping valve V13, vacuum vent valve V14, mixed gas terminal valve V15, mixed gas inlet valve V18, stream
Control valve V19, explosive container blow valve V20, wait at least closing all valves after five minutes；
(2) testing process vacuumizes：Close the first fuel gas outlet valve V2, the second fuel gas outlet valve V3, the first air
Outlet valve V6, the second air outlet valve V7, gas blow valve V11, vacuum vent valve V14, mixed gas blow valve V16 and explosion
Container blow valve V20, remaining valve is fully open, opens vacuum pump, when vacuum degree is less than 20Pa in flow, closes all valves
Door stops vacuum pump；
(3) method distribution is divided：The first fuel gas outlet valve V2, gas pressure regulating valve V12, mixed gas terminal valve V15 are opened,
It slowly opens fuel gas and exports main valve V9, after stirring container pressure reaches fuel gas setting value, close the first combustible gas
Body outlet valve V2 and fuel gas outlet main valve V9；The first air outlet valve V6 is opened, air outlet slit main valve V10 is slowly opened,
After container inner pressure to be mixed reaches total pressure set points, the first air outlet valve V6, air outlet slit main valve V10, gas are closed
Body pressure regulator valve V12 and mixed gas terminal valve V15；It opens magnetic stirring apparatus 5 minutes, opens gas chromatograph interface valve
V22 carries out gas component measurement by gas chromatograph and records, close gas chromatograph interface valve V22, opens mixed gas
Inlet valve V18, flow control valve V19 slowly open mixed gas terminal valve V15, wait for that pressure reaches setting in explosive container
All valves are closed after value；
(4) freeze：It keeps all valves to close, opens refrigerating plant, to gas refrigeration in explosive container, temperature reaches setting value
After close refrigerating plant；
(5) point, which is fought, records test result：It puts pressure and temperature in fighting record blast process to change with time, carry out multiple
Experimental test determines the explosion limit and minimum ignition energy of fuel gas；
(6) pressure release：Blow valve V20 is opened to the air venting in explosive container；
(7) all valves are opened, the operation of step 1-6 is repeated, is tested next time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510140603.6A CN104749218B (en) | 2015-03-27 | 2015-03-27 | Flammable gas explosion characteristic test device and method under ultralow temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510140603.6A CN104749218B (en) | 2015-03-27 | 2015-03-27 | Flammable gas explosion characteristic test device and method under ultralow temperature |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104749218A CN104749218A (en) | 2015-07-01 |
| CN104749218B true CN104749218B (en) | 2018-11-02 |
Family
ID=53589214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510140603.6A Active CN104749218B (en) | 2015-03-27 | 2015-03-27 | Flammable gas explosion characteristic test device and method under ultralow temperature |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104749218B (en) |
Families Citing this family (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105136855B (en) * | 2015-09-30 | 2018-02-09 | 常熟理工学院 | A kind of dust fires test device |
| CN105372404A (en) * | 2015-11-03 | 2016-03-02 | 中煤科工集团重庆研究院有限公司 | Low-temperature gas explosion characteristic test method |
| CN105241922A (en) * | 2015-11-03 | 2016-01-13 | 中煤科工集团重庆研究院有限公司 | Test tank for low temperature gas explosion characteristic test |
| CN105203596B (en) * | 2015-11-03 | 2018-06-29 | 中煤科工集团重庆研究院有限公司 | A kind of low temperature gas explosion characteristic test system |
| CN105259207B (en) * | 2015-11-03 | 2018-02-13 | 中煤科工集团重庆研究院有限公司 | A kind of gas low temperature heat exchange property test method |
| CN105891254B (en) * | 2016-06-30 | 2018-06-26 | 东北大学 | Dust layer under a kind of effect of electric spark catches fire sensitivity test device and method |
| CN107014857A (en) * | 2017-04-21 | 2017-08-04 | 机械工业上海蓝亚石化设备检测所有限公司 | A kind of experimental rig compatible with oxygen for deep cooling container heat-insulating material |
| CN107271158A (en) * | 2017-05-25 | 2017-10-20 | 中海油天津化工研究设计院有限公司 | A kind of special blow-cook explosive test tank |
| CN107943136B (en) * | 2017-11-16 | 2019-09-20 | 中北大学 | A kind of efficient no magnetic temperature control device based on heat transfer and thermal convection |
| CN108802270B (en) * | 2018-06-25 | 2021-07-06 | 中国石油大学(华东) | Methane hydrate combustion characteristic testing device |
| CN109374677B (en) * | 2018-09-25 | 2020-08-25 | 大连理工大学 | System and method for rapidly testing explosion limit of combustible medium under high temperature and high pressure |
| CN109668924B (en) * | 2019-01-22 | 2024-05-10 | 中国工程物理研究院激光聚变研究中心 | Submerged gas liquefaction cryogenic experiment device and experiment method thereof |
| CN110346411A (en) * | 2019-03-27 | 2019-10-18 | 安徽理工大学 | A kind of vacuum explosion experimental facility |
| CN110736580B (en) * | 2019-10-28 | 2021-04-27 | 中国科学院合肥物质科学研究院 | Hydrogen-dry air-water vapor explosion pressure testing device and testing method |
| CN111337363B (en) * | 2020-03-30 | 2022-04-05 | 哈尔滨工程大学 | Device and method for testing performance of thermoelectric material |
| CN111380911B (en) * | 2020-05-07 | 2022-09-16 | 中北大学 | Device and method for testing critical explosion temperature of explosive substance solution |
| CN111380910B (en) * | 2020-05-07 | 2022-09-16 | 中北大学 | Device for testing critical explosion temperature of explosive substance solution |
| CN111380909B (en) * | 2020-05-07 | 2023-03-31 | 中北大学 | Critical explosion temperature testing container for explosive material solution |
| CN111664967B (en) * | 2020-06-22 | 2021-05-11 | 东风商用车有限公司 | Exhaust manifold thermal stress assessment device and method |
| CN111795762B (en) * | 2020-07-22 | 2022-05-13 | 南京理工大学 | Device and method for calibrating dynamic characteristics of heat flow meter |
| CN111980903A (en) * | 2020-07-30 | 2020-11-24 | 珠海格力电器股份有限公司 | Detection assembly for measuring pressure in pump body, detection assembly of compressor and compressor |
| CN111982965B (en) * | 2020-08-05 | 2024-03-26 | 中国石油天然气集团有限公司 | Cooling system for continuous heating explosion test of liquefied petroleum gas cylinder |
| CN112326733B (en) * | 2020-10-27 | 2023-11-14 | 南京森峰科技有限公司 | Method for detecting spontaneous decomposition explosion risk of combustible gas |
| CN114354688B (en) * | 2022-01-06 | 2024-04-12 | 北京理工大学 | Ultralow-temperature hydrogen explosion flow field test monitoring system |
| CN114544706B (en) * | 2022-01-18 | 2023-08-01 | 中国矿业大学(北京) | Experiment system and method for measuring energy distribution proportion relation of explosion products |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102788817A (en) * | 2012-08-24 | 2012-11-21 | 中煤科工集团重庆研究院 | Research method of ultralow temperature gas explosion experiment under ultralow temperature environment |
| CN102818821A (en) * | 2012-08-24 | 2012-12-12 | 中煤科工集团重庆研究院 | Combustible gas explosion feature experiment system in ultralow temperature environment |
-
2015
- 2015-03-27 CN CN201510140603.6A patent/CN104749218B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102788817A (en) * | 2012-08-24 | 2012-11-21 | 中煤科工集团重庆研究院 | Research method of ultralow temperature gas explosion experiment under ultralow temperature environment |
| CN102818821A (en) * | 2012-08-24 | 2012-12-12 | 中煤科工集团重庆研究院 | Combustible gas explosion feature experiment system in ultralow temperature environment |
Non-Patent Citations (3)
| Title |
|---|
| effect of low temperature on the flammability limits of methane、nitrogen mixtures;Zhenming Li等;《ENERGY>;20110810;第36卷;第5521-5524页 * |
| Effect of low temperature on the flammability limits of methane/nitrogen mixtures;Zhenming Li等;《ENERGY》;20110810;第36卷;第5521-5524页 * |
| Effect of vessel size and shape on experimental flammability limits of gases;Akifumi Takahashi等;《Journal of Hazardous Materials》;20031231;第A105卷;第27-37页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104749218A (en) | 2015-07-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104749218B (en) | Flammable gas explosion characteristic test device and method under ultralow temperature | |
| CN104749217B (en) | Flammable gas explosion minimum ignition energy tests system and method under ultralow temperature | |
| CN204832085U (en) | Height warm purgation combustible gas explosion characteristic testing experiment device | |
| CN102818821B (en) | Combustible gas explosion feature experiment system in ultralow temperature environment | |
| Mitu et al. | Explosion parameters of methanol–air mixtures | |
| Razus et al. | The rate of pressure rise of gaseous propylene–air explosions in spherical and cylindrical enclosures | |
| CN114813405B (en) | Petrochemical device rupture disk failure mode under dynamic load and blasting performance detection test device and method | |
| CN109374677A (en) | Combustible medium explosion limit fast testing system and method under a kind of high temperature and pressure | |
| CN109374678A (en) | Combustible medium igniting and blast characteristics test macro and method under a kind of high temperature and pressure | |
| CN107449799B (en) | A kind of Mixed Gases Explosion on-site testing device and assay method | |
| CN105588780B (en) | Extinguishing chemical hinders inerting Performance Test System and its method of testing | |
| CN104569316B (en) | A kind of CO2inject and coal bed gas enhanced recovery geochemical effect simulation test device | |
| CN105372404A (en) | Low-temperature gas explosion characteristic test method | |
| CN107345894A (en) | Hemocyanin | |
| US20230228664A1 (en) | Method of evaluating aerosol removal rate by steam condensation in steel containment | |
| Tian et al. | Experimental study of accidental release behavior of high-pressurized CO2 vessel | |
| CN109855982A (en) | A kind of liquefied petroleum gas cylinder explosion test device and test method | |
| CN206096009U (en) | Oil gas well fires fracturing medicament high temperature high pressure security testing arrangement | |
| CN105352825A (en) | Test device for closed tank dynamic response under action of combustible gas explosion | |
| CN214539358U (en) | High-temperature high-pressure explosion limit tester | |
| CN104280420B (en) | A kind of liquid fuel steam explosion limit measures system and assay method | |
| CN110736580B (en) | Hydrogen-dry air-water vapor explosion pressure testing device and testing method | |
| CN205210005U (en) | Test combustible gas or steam explosion limit's autoclave system | |
| CN101788468A (en) | Method for detecting toxic gases generated by high-energy gas fracture | |
| CN205103196U (en) | Low temperature gas explosion characteristic testing system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Cui Gan Inventor after: Zhao Xiangyu Inventor after: Li Zili Inventor after: Li Hongbo Inventor after: Wang Hongying Inventor after: Li Yang Inventor after: Liu Jianguo Inventor after: Fu Yang Inventor after: Yang Chao Inventor after: Wang Meng Inventor before: Li Zili Inventor before: Zhao Xiangyu Inventor before: Cui Gan Inventor before: Li Hongbo Inventor before: Wang Hongying Inventor before: Li Yang Inventor before: Liu Jianguo Inventor before: Fu Yang Inventor before: Yang Chao Inventor before: Wang Meng |
|
| CB03 | Change of inventor or designer information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |