CN104749218A - Device and method for testing explosion properties of flammable gases at ultralow temperature - Google Patents
Device and method for testing explosion properties of flammable gases at ultralow temperature Download PDFInfo
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Abstract
The invention relates to a device and a method for testing the explosion properties of flammable gases at ultralow temperature. The device comprises a refrigerating device, an explosion vessel with a length-diameter ratio of 3 to 1 is arranged in an inner cavity of the refrigerating device, a gap is formed between the explosion vessel and the inner cavity of the refrigerating device, and a heat conducting material by which the temperatures of the explosion vessel and gas in the explosion vessel are reduced to an experimental temperature is added in the gap; the top of the explosion vessel is sealed by a blind flange, two ignition electrodes connected with an ignition energy console are arranged in the explosion vessel, the bottom of the explosion vessel is provided with a liquid outlet for implementing the cleaning of deposited carbon in the explosion vessel, and a strain gage for carrying out real-time monitoring on heat stress produced in the process of explosion is attached to the inner wall of the explosion vessel; and the blind flange is provided with a temperature sensor, a pressure sensor, a gas inlet and a gas outlet, and the gas inlet and the gas outlet are communicated with the inside of the explosion vessel. The device disclosed by the invention can be used for eliminating the trouble that the application amount of liquid nitrogen in liquid-nitrogen refrigerating is huge, and avoiding the occurrence of risks and ultra-high heat stress caused by the rapid evaporation of liquid nitrogen due to heat produced by explosion; and the device is high in refrigeration efficiency, and can meet the requirements on minimum ignition energy and explosion limit tests.
Description
Technical field
The invention belongs to commercial production security technology area, specifically, relate to proving installation and the method for the characteristic research such as combustible gas explosion limit under a kind of ultra-low temperature surroundings.
Background technology
China's coal bed gas resource rich reserves, development potentiality is huge.Many containing constituent of air such as nitrogen oxygen in the coal-seam gas of now exploiting, there is explosion hazard.Coal gas gasification is one of main application of coal-seam gas, in the purification phase of coal gas gasification flow process, in rectification column, along with the liquefaction gradually of methane is purified, rectification column top oxygen, nitrogen content increase gradually, and the content of methane is lower, therefore under the operating mode of rectification column " cryogenic high pressure ", methane may be within the scope of explosion limits, if meet fragmentary spark or the external heat source impact of remaining heavy hydrocarbon particle and dust collision generation, just likely causes combustion explosion.Therefore, in order to ensure the security of coal gas gasification flow process, must to the explosion limits of inflammable gas under condition of ultralow temperature such as grasp coalbed methane containing oxygen etc., and pressure, the isoparametric Changing Pattern of temperature in blast process.A lot of scholar and technician all study in flammable gas explosion characteristic, but under its research direction concentrates on inflammable gas normal temperature and pressure or high temperature and high pressure condition often, the research for the worst cold case relating to inflammable gas liquefaction is very few.
Chinese patent application publication No. CN 102788817A, November 21 2012 Shen Qing Publication day, the name of innovation and creation is called flammable gas explosion characteristic test research method under ultra-low temperature surroundings, the patent application discloses following specific features: be first evacuated by blast tank body; Then inflammable gas to be measured be filled with blast tank body and lower the temperature; Finally light inflammable gas to be measured, and gather blast tank body implode characteristic parameter data, and preserve blast characteristics supplemental characteristic.The advantage of this invention is: this invention, for flammable gas explosion characteristic test research method under ultra-low temperature surroundings, mainly solves the relevant issues such as flammable gas explosion characteristic test system and experiment flow under ultra-low temperature surroundings; This invention, for the mensuration of combustible gas explosion limit under ultra-low temperature surroundings, also can carry out ultra-low temperature surroundings Explosion Pressure of Flammable Gases and the isoparametric mensuration of rate of pressure rise and experimental study work; The mensuration of this invention mainly for gas utilization cryogenic liquefying technique ultra-low temperature surroundings coal-seam gas explosion limits and the mensuration of other industrial inflammable gass explosive characteristic parameter under ultra-low temperature surroundings.Its weak point is: what 1. Refrigeration Technique adopted is liquid nitrogen refrigerating, and liquid nitrogen easily volatilizees and makes liquid nitrogen consumption huge, uneconomical under atmospheric environment; Flammable gas explosion produces a large amount of heat, liquid nitrogen Quick-gasifying in interlayer may be made to cause physical explosion to endanger by heat transfer.2. blast tank body used is 20L, and volume is comparatively large, and the length-diameter ratio of cylindrical explosive container is 1 ~ 1.5 substantially, finds after deliberation, and container chamber wall in blast process of these physical dimensions can produce very large thermal stress.So-called thermal stress is interpreted as: in blasting pot, gas burst completes instantaneously, blast produces a large amount of heats, pass to container inner wall rapidly by thermal convection and heat radiation, make container inner wall temperature increase rapidly, container outer wall is also in lower temperature, container inside and outside wall is made to have larger thermograde, thus produce very large thermal stress at chamber wall, can up to 1000MPa, much larger than the permissible stress of material, container was lost efficacy, causes very large potential safety hazard.3. Accurate Measurement cannot be carried out to the minimum ignition energy of inflammable gas, especially the determination of sensitive condition; For explosive container physical dimension and blast occur criterion study, cannot the parameters such as more accurate explosion limits be obtained.4., after repeatedly exploding, container inner wall and spark electrode can produce a large amount of carbon distribution, and container cover must be opened and carry out internal cleaning by equipment therefor, wastes time and energy.5. the detailed process of blast characteristics test is not provided.
Summary of the invention
The object of the invention is to the problems referred to above for existing in existing flammable gas explosion characteristic test process, flammable gas explosion characteristic test device and method under a kind of ultralow temperature are provided, described proving installation can eliminate the puzzlement that in liquid nitrogen refrigerating, liquid nitrogen use amount is huge, the risk that the heat that avoiding explodes produces makes liquid nitrogen volatilize fast to cause and thermal stress too high, refrigerating efficiency is high, can meet the requirement of minimum ignition energy and explosion limits test.
Technical scheme of the present invention is: flammable gas explosion characteristic test device under a kind of ultralow temperature, comprise a refrigerating plant, the explosive container that a length-diameter ratio is 3:1 is placed with at the inner chamber of described refrigerating plant, form gap between the inner chamber of described explosive container and described refrigerating plant, this gap location is added with the Heat Conduction Material making the gas in explosive container and explosive container be down to experimental temperature; The top of described explosive container is by a blind flange sealing, described explosive container inside is provided with two spark electrodes be connected with ignition energy control desk, the bottom of described explosive container is provided with the leakage fluid dram realizing carbon distribution cleaning in explosive container, the inwall of described explosive container posts the foil gauge of thermal stress in Real-Time Monitoring blast process; Described blind flange is provided with temperature sensor, pressure transducer and the air admission hole be communicated with described explosive container inside and vent port.
Further, in above-mentioned proving installation, described refrigerating plant outside is provided with a protective cover, and described temperature sensor is connected with a data collecting instrument respectively by connecting line with temperature sensor.
As preferably, in above-mentioned proving installation, described refrigerating plant adopts cryogenic testing case, and its serviceability temperature scope is room temperature ~-160 DEG C, and described cryogenic testing case inside adopts compressor cooling, and refrigerant circulation uses; The RS232 interface that described cryogenic testing case is provided with touch screen operation interface and is connected with outer end computing machine.
As preferably, in above-mentioned proving installation, described explosive container adopts 304 stainless steels, and its size gets internal diameter 100mm, height 300mm, is the cylindrical of useful volume 2.355L, base seal, and top and described blind flange adopt the form of Flange joint to be connected; The design pressure of described explosive container is 45MPa, and its temperature range of bearing is room temperature ~-150 DEG C.
Further, in above-mentioned proving installation, described ignition energy control desk is by testing voltage and the discharge current of spark electrode, integral method is adopted to obtain the value of minimum ignition energy, form electric spark between spark electrode to ignite inflammable gas, now, the air pressure resistance 2MPa of inflammable gas, the 50MPa of resistance to instantaneous pressure; Wherein, it be 2MPa is to complete electric discharge that air pressure resistance 2MPa refers at initial gas (i.e. blast before) pressure, because along with the rising of pressure, and more difficult completing of discharging; Instantaneous pressure 50MPa refers to the gaseous tension that instant of detonation produces, and ensures not blown up at instant of detonation spark electrode; The igniting energy storage energy that described ignition energy control desk produces comprises the low-yield district meeting inflammable gas minimum ignition energy test request under ultralow temperature and the high-energy district meeting explosion limits test request.
Further, in above-mentioned proving installation, described blind flange being provided with the installation through hole for installing spark electrode, temperature sensor and pressure transducer, wherein, two for installing spark electrode the Central Symmetry of through hole relative to blind flange being installed.
Further, in above-mentioned proving installation, described air admission hole is connected with the first interface of a three-way pipe, and the second interface of described three-way pipe is provided with the safety valve playing decompression protection effect, and the 3rd interface of described three-way pipe is connected with a draft tube; Described vent port is connected with a gas outlet, and the other end of described gas outlet is connected with the first interface of a three-way pipe, and the second interface of described three-way pipe is connected with and sample valve, and the 3rd interface is connected with explosive container atmospheric valve.
Further, in above-mentioned proving installation, be connected with flame arrester for pipe, tensimeter and flowrate control valve in turn between the 3rd interface of described three-way pipe and described draft tube, described sample valve connects a gas chromatograph.
As preferably, in above-mentioned proving installation, described Heat Conduction Material is aluminium powder; Described pressure transducer adopts piezoelectric transducer, and described temperature sensor adopts thermopair sensor.
Present invention also offers flammable gas explosion characteristic test method under a kind of ultralow temperature, the device adopted in test process comprises flammable gas explosion characteristic test device and gas chromatograph under source of the gas, pumped vacuum systems, gas agitating system, ultralow temperature, described source of the gas is for being contained with inflammable gas and compressed-air actuated steel cylinder, described pumped vacuum systems comprises vacuum pump and vacuum tank, the magnetic stirring apparatus that described gas agitating system comprises the withstand voltage stirred vessel for 20MPa and stirs gas in stirred vessel; The concrete steps of its test are as follows:
(1) before test, flow process purges: keep all valve closings, open air out 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 atmospheric valve V17, mixed gas admission valve V18, flowrate control valve V19, explosive container atmospheric valve V20, after at least 5 minutes, close all valves;
(2) testing process vacuumizes: close the first inflammable gas outlet valve V2, the second inflammable gas outlet valve V3, the first air outlet valve V6, the second air outlet valve V7, gas atmospheric valve V11, vacuum vent valve V14, mixed gas atmospheric valve V16 and explosive container atmospheric valve V20, all the other valves are all opened, open vacuum pump, when in flow process, vacuum tightness is less than 20Pa, close all valves, stop vacuum pump;
(3) point platen press distribution: open the first inflammable gas outlet valve V2, gas pressure regulating valve V12, mixed gas terminal valve V15, slowly open inflammable gas outlet main valve V9, after stirred vessel pressure reaches inflammable gas setting value, close the first inflammable gas outlet valve V2 and inflammable gas outlet main valve V9; Open the first air outlet valve V6, slowly open air out main valve V10, after container inner pressure to be mixed reaches total pressure set points, close the first air outlet valve V6, air out main valve V10, gas pressure regulating valve V12 and mixed gas terminal valve V15; Open magnetic stirring apparatus 5 minutes, open gas chromatograph interface valve V22, gas composition mensuration is carried out and record by gas chromatograph, close gas chromatograph interface valve V22, open mixed gas admission valve V18, flowrate control valve V19, slowly open mixed gas terminal valve V15, reach after setting value until pressure in explosive container and close all valves;
(4) freeze: keep all valve closings, open refrigerating plant, to gas refrigeration in explosive container, temperature closes refrigerating plant after reaching setting value;
(5) to fight logging test results: some pressure and temperature in record blast process of fighting over time, carries out test of many times test, determines explosion limits and the minimum ignition energy of inflammable gas;
(6) pressure release: open atmospheric valve V20 to the air venting in explosive container;
(7) open all valves, repeat the operation of step 1-6, test next time.
The invention has the beneficial effects as follows:
(1) proving installation of the present invention is provided with refrigerating plant, adopt compressor cooling, refrigerant circulation uses, easy temperature control system, can eliminate the puzzlement that in liquid nitrogen refrigerating, liquid nitrogen use amount is huge, the risk that the heat that avoiding explodes produces makes liquid nitrogen volatilize fast to cause and thermal stress too high, simultaneously, inner chamber and the explosive container of refrigerating plant fit together, and lowered the temperature by heat conducting mode, refrigerating efficiency is high.
(2) explosive container of the present invention adopts optimum-size design, length-diameter ratio is 3:1, the thermal stress that blast produces on the one hand is no more than 200MPa, lower than the permissible stress of container material, container diameter is 100mm on the other hand, diameter is enough large, avoids the wall effect of chamber wall to the impact of blast characteristics data.
(3) explosive container inwall of the present invention posts foil gauge, thermal stress in Real-Time Monitoring blast process, once container inner wall thermal stress is close to the permissible stress of material, test can be stopped immediately, and no longer carry out the test (as lower in gas initial temperature or original pressure is higher) of dangerous working condition more.
(4) be provided with leakage fluid dram bottom explosive container of the present invention, the installation through hole installing spark electrode from blind flange injects cleaning fluid, flows out from leakage fluid dram, conveniently clears up carbon distribution in explosive container, avoids the inconvenience that dismounting flange cover strip is come.
(5) ignition energy control desk of the present invention adopts low-yield district and two, high-energy district shelves, the requirement of minimum ignition energy and explosion limits test can be met respectively, the curve negotiating integral method that spark electrode electric discharge actual energy can be changed by the electric current and voltage of oscillograph recording calculates and accurately draws, reduces error.
(6) refrigerating plant outside of the present invention is provided with protective cover, can avoiding device just in case blast accident time staff is damaged.
(7) pressure transducer of the present invention adopts piezoelectric transducer, charge amplifier is coordinated to use, range is 35MPa, serviceability temperature is-240 ~ 316 DEG C, high temperature resistant 1649 DEG C of moment, its sample frequency is high, sample frequency >=200kHz, can ensure to collect complete explosion pressure waveform undistorted; Temperature sensor adopts thermopair sensor, temperature-measuring range-200 ~ 1300 DEG C, response time 18ms, withstand voltage 68MPa.
Accompanying drawing explanation
Fig. 1 is the structural representation of specific embodiment of the invention proving installation.
Fig. 2 is the vertical view of specific embodiment of the invention proving installation.
Fig. 3 is anatomical connectivity figure between each ingredient in flammable gas explosion characteristic test process under specific embodiment of the invention ultra-low temperature surroundings.
Wherein, 1, tensimeter, 2, flame arrester for pipe, 3, flowrate control valve, 4, safety valve, 5, explosive container atmospheric valve, 6, sample valve, 7, air admission hole, 8, temperature sensor, 9, explosive container, 10, blind flange, 11, vent port, 12, pressure transducer, 13, super low temperature refrigeration case, 14, spark electrode, 15, protective cover, 16, foil gauge, 17, leakage fluid dram, 18, cable, 19, aluminium powder, V1, inflammable gas atmospheric valve, V2, first inflammable gas outlet valve, V3, second inflammable gas outlet valve, V4, inflammable gas atmospheric valve, V5, air vent valve, V6, first air outlet valve, V7, second air outlet valve, V8, air vent valve, V9, inflammable gas outlet main valve, V10, air out main valve, V11, gas atmospheric valve, V12, gas control valve, V13, vacuum pumping valve, V14, vacuum vent valve, V15, mixed gas terminal valve, V16, mixed gas atmospheric valve, V17, stirred vessel bleeder valve, V18, mixed gas admission valve, V19, flowrate control valve, V20, explosive container atmospheric valve, V21, explosive container bleeder valve, V22, gas chromatograph interface valve.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figure 1, flammable gas explosion characteristic test device under a kind of ultralow temperature, comprise a refrigerating plant, the explosive container 9 that a length-diameter ratio is 3:1 is placed with at the inner chamber of described refrigerating plant, form gap between described explosive container 9 and the inner chamber of described refrigerating plant, this gap location is added with the Heat Conduction Material aluminium powder 19 making the gas in explosive container 9 and explosive container 9 be down to experimental temperature; The top of described explosive container 9 is sealed by a blind flange 10, described explosive container inside is provided with two spark electrodes 14 be connected with ignition energy control desk, the bottom of described explosive container 9 is provided with the leakage fluid dram 17 realizing carbon distribution cleaning in explosive container, the inwall of described explosive container 9 posts the foil gauge 16 of thermal stress in Real-Time Monitoring blast process; Described blind flange 10 is provided with temperature sensor 8, pressure transducer 12 and the air admission hole 7 be communicated with described explosive container 9 inside and vent port 11.
In the present embodiment, as shown in Figure 1, described refrigerating plant outside is provided with a protective cover 15, for preventing emergency case to the injury of experimenter, described refrigerating plant adopts cryogenic testing case 13, its serviceability temperature scope is room temperature ~-160 DEG C, and described cryogenic testing case 13 inside adopts compressor cooling, and refrigerant circulation uses; The RS232 interface that described cryogenic testing case 13 is provided with touch screen operation interface and is connected with outer end computing machine, RS232 interface is connected with outer end computing machine, can carry out on the spot or Long-distance Control cryogenic temperature.
In the present embodiment, size and explosive container 9 physical dimension of described cryogenic testing case 13 are basically identical, aluminium powder is added in the gap that explosive container 9 and cryogenic testing case 13 inner chamber are formed, explosive container 9 and cryogenic testing case 13 are closely linked, utilize heat conducting mode to the gas refrigeration of explosive container 9 and inside thereof.Described explosive container 9 adopts 304 stainless steels, its size gets internal diameter 100mm, height 300mm, for the cylindrical of useful volume 2.355L, internal diameter 100mm can meet the requirement that explosion gas propagates minimum dimension, avoid occurring avoiding phenomenon of quenching, length-diameter ratio is 3:1, can to meet in blast process under the prerequisite of thermal stress lower than material permissible stress, make the temperature fall time of explosive container 9 the shortest; The base seal of explosive container 9, top adopts the form of Flange joint to be connected with described blind flange 10, and sealing is good; The design pressure of described explosive container 9 is 45MPa, and its temperature range of bearing is room temperature ~-150 DEG C.
In the present embodiment, described ignition energy control desk, by testing voltage and the discharge current of spark electrode, adopts integral method to obtain the value of minimum ignition energy, improves the accuracy of experimental data.The igniting energy storage energy that described ignition energy control desk produces comprises the low-yield district meeting inflammable gas minimum ignition energy test request under ultralow temperature and the high-energy district meeting explosion limits test request, wherein, low-yield district 0.08mJ ~ 50mJ and 50mJ ~ 1000mJ continuously adjustabe, there is 20J point in high-energy district, and discharge energy is enough large.Form electric spark between two spark electrodes to ignite inflammable gas, air pressure resistance 2MPa, the 50MPa of resistance to instantaneous pressure, can normally work after can ensureing gas burst.Wherein, it be 2MPa is to complete electric discharge that air pressure resistance 2MPa refers at initial gas (i.e. blast before) pressure, because along with the rising of pressure, and more difficult completing of discharging; Instantaneous pressure 50MPa refers to the gaseous tension that instant of detonation produces, and ensures not blown up at instant of detonation spark electrode.
In the present embodiment, described blind flange 10 being provided with the installation through hole for installing spark electrode 14, temperature sensor 8 and pressure transducer 12, wherein, two for installing spark electrode 14 Central Symmetry of through hole relative to blind flange 10 being installed.
In the present embodiment, as shown in Figure 1, described air admission hole 7 is connected with the first interface of a three-way pipe, second interface of described three-way pipe is provided with the safety valve 4 playing decompression protection effect, when the pressure in explosive container 9 exceedes limit value, automatic vent pressure release, ensure the safety of proving installation, the 3rd interface of described three-way pipe is connected with a draft tube; Described vent port 11 is connected with a gas outlet, the other end of described gas outlet is connected with the first interface of a three-way pipe, second interface of described three-way pipe is connected with sample valve 6,3rd interface is connected with explosive container atmospheric valve 5, for being discharged in explosive container 9 by blow-down pipe by the gases at high pressure after blast.
In the present embodiment, flame arrester for pipe 2, tensimeter 1 and flowrate control valve 3 is connected with in turn between 3rd interface of described three-way pipe and described draft tube, described sample valve 6 connects a gas chromatograph, sample valve 6, to gas sample before blast, utilizes composition and the concentration of gas chromatograph analytical gas.
In the present embodiment, described leakage fluid dram is threaded hole, connects during experiment with screw, when explosive container 9 cleans de-carbon, injects cleaning fluid, flow out from threaded hole in the installation through hole that blind flange 10 installs spark electrode 14.
In the present embodiment, described foil gauge 16 is connected by cable 18, the change of explosive container 9 inner surface heat stress in Real-Time Monitoring blast process, to take measures in time to ensure device security.
In the present embodiment, described temperature sensor 8 is connected with a data collecting instrument respectively by connecting line with pressure transducer 12, by the temperature and pressure parameter transmission of gas in the explosive container 9 of measurement to data collecting instrument, realizes the collection of Exploding test data.Wherein, described pressure transducer adopts piezoelectric transducer, charge amplifier is coordinated to use, range is 35MPa, serviceability temperature is-240 ~ 316 DEG C, high temperature resistant 1649 DEG C of moment, through the simulation to Explosion Pressure of Flammable Gases ascending velocity, determine to adopt frequency >=200kHz, ensure can gather as far as possible many data points in the time period of gas when starting blast and reaching maximal value to explosion pressure, thus complete for explosion pressure waveform is recorded, conveniently rule analyzed and determine that criterion occurs in blast.Described temperature sensor adopts thermopair sensor, temperature-measuring range-200 ~ 1300 DEG C, response time 18ms, withstand voltage 68MPa.
Present invention also offers flammable gas explosion characteristic test method under a kind of ultralow temperature, as shown in Figure 3, the device adopted in test process comprises flammable gas explosion characteristic test device and gas chromatograph under source of the gas, pumped vacuum systems, gas agitating system, ultralow temperature, described source of the gas is for being contained with inflammable gas and compressed-air actuated steel cylinder, described pumped vacuum systems comprises vacuum pump and vacuum tank, the magnetic stirring apparatus that described gas agitating system comprises the withstand voltage stirred vessel for 20MPa and stirs gas in stirred vessel; The concrete steps of its test are as follows:
(1) before test, flow process purges: keep all valve closings, open air out main valve V10, gas atmospheric valve V11, gas pressure regulating valve V12, vacuum pumping valve V13, vacuum vent valve V14, mixed gas terminal valve V15, mixed gas atmospheric valve V17, mixed gas admission valve V18, flowrate control valve V19, explosive container atmospheric valve V20, after at least 5 minutes, close all valves;
(2) testing process vacuumizes: close the first inflammable gas outlet valve V2, the second inflammable gas outlet valve V3, the first air outlet valve V6, the second air outlet valve V7, gas atmospheric valve V11, vacuum vent valve V14, mixed gas atmospheric valve V16 and explosive container atmospheric valve V20, all the other valves are all opened, open vacuum pump, when in flow process, vacuum tightness is less than 20Pa, close all valves, stop vacuum pump;
(3) point platen press distribution: open the first inflammable gas outlet valve V2, gas pressure regulating valve V12, mixed gas terminal valve V15, slowly open inflammable gas outlet main valve V9, after stirred vessel pressure reaches inflammable gas setting value, close the first inflammable gas outlet valve V2 and inflammable gas outlet main valve V9; Open the first air outlet valve V6, slowly open air out main valve V10, after container inner pressure to be mixed reaches total pressure set points, close the first air outlet valve V6, air out main valve V10, gas pressure regulating valve V12 and mixed gas terminal valve V15; Open magnetic stirring apparatus 5 minutes, open gas chromatograph interface valve V22, gas composition mensuration is carried out and record by gas chromatograph, close gas chromatograph interface valve V22, open mixed gas admission valve V18, flowrate control valve V19, slowly open mixed gas terminal valve V15, reach after setting value until pressure in explosive container and close all valves;
(4) freeze: keep all valve closings, open refrigerating plant, to gas refrigeration in explosive container, temperature closes refrigerating plant after reaching setting value;
(5) to fight logging test results: some pressure and temperature in record blast process of fighting over time, carries out test of many times test, determines explosion limits and the minimum ignition energy of inflammable gas;
(6) pressure release: open atmospheric valve V20 to the air venting in explosive container;
(7) open all valves, repeat the operation of step 1-6, test next time.
Above illustrated embodiment is only with illustrating the present invention for convenience; not limiting the scope of the invention; at technical scheme category of the present invention, person of ordinary skill in the field does various simple deformation and modification, all should be included in above claim.
Claims (10)
1. flammable gas explosion characteristic test device under a ultralow temperature, it is characterized in that: comprise a refrigerating plant, the explosive container that a length-diameter ratio is 3:1 is placed with at the inner chamber of described refrigerating plant, form gap between the inner chamber of described explosive container and described refrigerating plant, this gap location is added with the Heat Conduction Material making the gas in explosive container and explosive container be down to experimental temperature; The top of described explosive container is by a blind flange sealing, described explosive container inside is provided with two spark electrodes be connected with ignition energy control desk, the bottom of described explosive container is provided with the leakage fluid dram realizing carbon distribution cleaning in explosive container, the inwall of described explosive container posts the foil gauge of thermal stress in Real-Time Monitoring blast process; Described blind flange is provided with temperature sensor, pressure transducer and the air admission hole be communicated with described explosive container inside and vent port.
2. flammable gas explosion characteristic test device under ultralow temperature according to claim 1, is characterized in that: described refrigerating plant outside is provided with a protective cover, and described temperature sensor is connected with a data collecting instrument respectively by connecting line with pressure transducer.
3. flammable gas explosion characteristic test device under ultralow temperature according to claim 1, it is characterized in that: described refrigerating plant adopts cryogenic testing case, its serviceability temperature scope is room temperature ~-160 DEG C, and described cryogenic testing case inside adopts compressor cooling, and refrigerant circulation uses; The RS232 interface that described cryogenic testing case is provided with touch screen operation interface and is connected with outer end computing machine.
4. flammable gas explosion characteristic test device under ultralow temperature according to claim 1, it is characterized in that: described explosive container adopts 304 stainless steels, its size gets internal diameter 100mm, height 300mm, for the cylindrical of useful volume 2.355L, base seal, top and described blind flange adopt the form of Flange joint to be connected; The design pressure of described explosive container is 45MPa, and its temperature range of bearing is room temperature ~-150 DEG C.
5. flammable gas explosion characteristic test device under ultralow temperature according to claim 1, it is characterized in that: described ignition energy control desk is by testing voltage and the discharge current of spark electrode, adopt integral method to obtain the value of minimum ignition energy, form electric spark between two spark electrodes and to ignite inflammable gas; The igniting energy storage energy that described ignition energy control desk produces draws together the low-yield district meeting inflammable gas minimum ignition energy test request under ultralow temperature and the high-energy district meeting explosion limits test request.
6. flammable gas explosion characteristic test device under ultralow temperature according to claim 1, it is characterized in that: described blind flange is provided with the installation through hole for installing spark electrode, temperature sensor and pressure transducer, wherein, two for installing spark electrode the Central Symmetry of through hole relative to blind flange is installed.
7. flammable gas explosion characteristic test device under ultralow temperature according to claim 1, it is characterized in that: described air admission hole is connected with the first interface of a three-way pipe, second interface of described three-way pipe is provided with the safety valve playing decompression protection effect, and the 3rd interface of described three-way pipe is connected with a draft tube; Described vent port is connected with a gas outlet, and the other end of described gas outlet is connected with the first interface of a three-way pipe, and the second interface of described three-way pipe is connected with and sample valve, and the 3rd interface is connected with explosive container atmospheric valve.
8. flammable gas explosion characteristic test device under ultralow temperature according to claim 6, it is characterized in that: be connected with flame arrester for pipe, tensimeter and flowrate control valve in turn between the 3rd interface of described three-way pipe and described draft tube, described sample valve connects a gas chromatograph.
9. flammable gas explosion characteristic test device under ultralow temperature according to claim 1, is characterized in that: described Heat Conduction Material is aluminium powder; Described pressure transducer adopts piezoelectric transducer, and described temperature sensor adopts thermocouple-type sensor.
10. flammable gas explosion characteristic test method under a ultralow temperature, it is characterized in that: the device adopted in test process comprises flammable gas explosion characteristic test device and gas chromatograph under source of the gas, pumped vacuum systems, gas agitating system, ultralow temperature, described source of the gas is for being contained with inflammable gas and compressed-air actuated steel cylinder, described pumped vacuum systems comprises vacuum pump and vacuum tank, the magnetic stirring apparatus that described gas agitating system comprises the withstand voltage stirred vessel for 20MPa and stirs gas in stirred vessel; The concrete steps of its test are as follows:
(1) before test, flow process purges: keep all valve closings, open air out main valve V10, gas atmospheric valve V11, gas pressure regulating valve V12, vacuum pumping valve V13, vacuum vent valve V14, mixed gas terminal valve V15, mixed gas admission valve V18, flowrate control valve V19, explosive container atmospheric valve V20, after at least 5 minutes, close all valves;
(2) testing process vacuumizes: close the first inflammable gas outlet valve V2, the second inflammable gas outlet valve V3, the first air outlet valve V6, the second air outlet valve V7, gas atmospheric valve V11, vacuum vent valve V14, mixed gas atmospheric valve V16 and explosive container atmospheric valve V20, all the other valves are all opened, open vacuum pump, when in flow process, vacuum tightness is less than 20Pa, close all valves, stop vacuum pump;
(3) point platen press distribution: open the first inflammable gas outlet valve V2, gas pressure regulating valve V12, mixed gas terminal valve V15, slowly open inflammable gas outlet main valve V9, after stirred vessel pressure reaches inflammable gas setting value, close the first inflammable gas outlet valve V2 and inflammable gas outlet main valve V9; Open the first air outlet valve V6, slowly open air out main valve V10, after container inner pressure to be mixed reaches total pressure set points, close the first air outlet valve V6, air out main valve V10, gas pressure regulating valve V12 and mixed gas terminal valve V15; Open magnetic stirring apparatus 5 minutes, open gas chromatograph interface valve V22, gas composition mensuration is carried out and record by gas chromatograph, close gas chromatograph interface valve V22, open mixed gas admission valve V18, flowrate control valve V19, slowly open mixed gas terminal valve V15, reach after setting value until pressure in explosive container and close all valves;
(4) freeze: keep all valve closings, open refrigerating plant, to gas refrigeration in explosive container, temperature closes refrigerating plant after reaching setting value;
(5) to fight logging test results: some pressure and temperature in record blast process of fighting over time, carries out test of many times test, determines explosion limits and the minimum ignition energy of inflammable gas;
(6) pressure release: open atmospheric valve V20 to the air venting in explosive container;
(7) open all valves, repeat the operation of step 1-6, test next time.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510140603.6A CN104749218B (en) | 2015-03-27 | 2015-03-27 | Flammable gas explosion characteristic test device and method under ultralow temperature |
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| CN105136855A (en) * | 2015-09-30 | 2015-12-09 | 常熟理工学院 | Dust explosion testing device |
| CN105203596A (en) * | 2015-11-03 | 2015-12-30 | 中煤科工集团重庆研究院有限公司 | Low-temperature gas explosion characteristic test system |
| 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 |
| CN105259207A (en) * | 2015-11-03 | 2016-01-20 | 中煤科工集团重庆研究院有限公司 | Gas low-temperature heat exchange performance test method |
| 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 |
| CN105891254A (en) * | 2016-06-30 | 2016-08-24 | 东北大学 | Dust-layer ignition sensitivity testing device and method under action of electric sparks |
| 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 |
| CN107943136A (en) * | 2017-11-16 | 2018-04-20 | 中北大学 | A kind of efficient no magnetic temperature control device based on heat transfer and thermal convection current |
| CN108802270A (en) * | 2018-06-25 | 2018-11-13 | 中国石油大学(华东) | A kind of methane hydrate combustion characteristics test device |
| CN109374677A (en) * | 2018-09-25 | 2019-02-22 | 大连理工大学 | Combustible medium explosion limit fast testing system and method under a kind of high temperature and pressure |
| CN109668924A (en) * | 2019-01-22 | 2019-04-23 | 中国工程物理研究院激光聚变研究中心 | Submerged gas liquefaction deep cooling experimental provision and its experimental method |
| CN110346411A (en) * | 2019-03-27 | 2019-10-18 | 安徽理工大学 | A kind of vacuum explosion experimental facility |
| CN110736580A (en) * | 2019-10-28 | 2020-01-31 | 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 |
| CN111337363A (en) * | 2020-03-30 | 2020-06-26 | 哈尔滨工程大学 | Device and method for testing performance of thermoelectric material |
| CN111380909A (en) * | 2020-05-07 | 2020-07-07 | 中北大学 | Critical explosion temperature testing container for explosive material solution |
| CN111380910A (en) * | 2020-05-07 | 2020-07-07 | 中北大学 | Device for testing critical explosion temperature of explosive substance solution |
| CN111380911A (en) * | 2020-05-07 | 2020-07-07 | 中北大学 | Device and method for testing critical explosion temperature of explosive substance solution |
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| CN111982965A (en) * | 2020-08-05 | 2020-11-24 | 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 |
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| CN112326733A (en) * | 2020-10-27 | 2021-02-05 | 南京森峰科技有限公司 | Detection method for spontaneous decomposition explosion risk of combustible gas |
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| CN114354688A (en) * | 2022-01-06 | 2022-04-15 | 北京理工大学 | Ultralow-temperature hydrogen explosion flow field test monitoring system |
| CN114544706A (en) * | 2022-01-18 | 2022-05-27 | 中国矿业大学(北京) | Experimental system and method for measuring explosive product energy distribution proportion relation |
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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 |
|---|
| AKIFUMI TAKAHASHI等: "Effect of vessel size and shape on experimental flammability limits of gases", 《JOURNAL OF HAZARDOUS MATERIALS》 * |
| ZHENMING LI等: "effect of low temperature on the flammability limits of methane、nitrogen mixtures", 《ENERGY> * |
| ZHENMING LI等: "Effect of low temperature on the flammability limits of methane/nitrogen mixtures", 《ENERGY》 * |
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| CN105136855A (en) * | 2015-09-30 | 2015-12-09 | 常熟理工学院 | Dust explosion testing device |
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| CN105891254A (en) * | 2016-06-30 | 2016-08-24 | 东北大学 | Dust-layer ignition sensitivity testing device and method under action of electric sparks |
| 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 |
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| CN108802270A (en) * | 2018-06-25 | 2018-11-13 | 中国石油大学(华东) | A kind of methane hydrate combustion characteristics test device |
| CN109374677A (en) * | 2018-09-25 | 2019-02-22 | 大连理工大学 | Combustible medium explosion limit fast testing system and method under a kind of high temperature and pressure |
| CN109668924A (en) * | 2019-01-22 | 2019-04-23 | 中国工程物理研究院激光聚变研究中心 | Submerged gas liquefaction deep cooling experimental provision and its experimental method |
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| 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 |
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| CN111380911A (en) * | 2020-05-07 | 2020-07-07 | 中北大学 | Device and method for testing critical explosion temperature of explosive substance solution |
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| CN111380909B (en) * | 2020-05-07 | 2023-03-31 | 中北大学 | Critical explosion temperature testing container for explosive material solution |
| CN111380911B (en) * | 2020-05-07 | 2022-09-16 | 中北大学 | Device and method for testing critical explosion temperature of explosive substance solution |
| CN111380909A (en) * | 2020-05-07 | 2020-07-07 | 中北大学 | Critical explosion temperature testing container for explosive material solution |
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| CN111664967A (en) * | 2020-06-22 | 2020-09-15 | 东风商用车有限公司 | Exhaust manifold thermal stress assessment device and method |
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| CN111982965A (en) * | 2020-08-05 | 2020-11-24 | 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 |
| 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 |
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| CN112683183A (en) * | 2020-12-21 | 2021-04-20 | 大连理工大学 | Maximum test safety clearance measuring system capable of automatically adjusting clearance and measuring method thereof |
| CN114354688A (en) * | 2022-01-06 | 2022-04-15 | 北京理工大学 | Ultralow-temperature hydrogen explosion flow field test monitoring system |
| 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 |
| CN114544706A (en) * | 2022-01-18 | 2022-05-27 | 中国矿业大学(北京) | Experimental system and method for measuring explosive product energy distribution proportion relation |
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