CN102928457A - Experimental facility for testing autoignition temperature of gas in high-pressure oxygen-enriched environment - Google Patents
Experimental facility for testing autoignition temperature of gas in high-pressure oxygen-enriched environment Download PDFInfo
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- CN102928457A CN102928457A CN2012103903275A CN201210390327A CN102928457A CN 102928457 A CN102928457 A CN 102928457A CN 2012103903275 A CN2012103903275 A CN 2012103903275A CN 201210390327 A CN201210390327 A CN 201210390327A CN 102928457 A CN102928457 A CN 102928457A
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Abstract
The invention relates to an experimental facility for testing the autoignition temperature of a gas under a special dangerous (high-pressure oxygen-enriched) condition. The experiment facility comprises a gas supply part, a temperature-controlled heating part, a reactor part, a safety interlocking device and a PC (Personal Computer), wherein the reactor part comprises a cylinder body and a flange plate which are sealed; and 6 pipelines are distributed on the flange plate and are respectively used for vacuumizing, pressure detection, temperature detection, stirring, electromagnetic valve evacuation and being used as a safety valve. When the temperature raises by more than 20DEG C sharply, the sample burns; and when the safety valve trips out, the gas autoignites or deflagrates. According to the experimental facility, the autoignition temperature data is obtained by adjusting the system pressure and continuous temperature rise under the sealed condition, automatically recording the temperature data and judging whether the autoignition happens, the measuring conditions of the autoignition temperature are broadened; and the experimental facility disclosed by the invention is simpler to operate and realizes computer automation of experimental operation and data recording.
Description
Technical field
The present invention relates to the experimental provision of the self-ignition temperature of gas in a kind of testing high voltage oxygen-enriched environment.
Background technology
Self-ignition temperature also claims flashing temperature, be material under given conditions, without flame or spark, when material was higher than dissipation of heat speed because of the exothermic speed of exothermic oxidation reaction, temperature raise and to cause the minimum temperature of burning.The self-ignition temperature of gas and environmental pressure, oxygen content and container dimensional have much relations.
Existing experimental provision, test be the self-ignition temperature of combustible under the normal pressure air atmosphere, tested object is solid and liquid, and can't finish the measurement of self-ignition temperature under the different pressures excess oxygen.According to the situation of literature search and market survey, the domestic experimental test that not yet has relevant mechanism to carry out the self-ignition temperature of gas under high-pressure oxygen-enriched environment also designed similar proving installation.
Summary of the invention
The present invention is the experimental system of the self-ignition temperature of mensurated gas composition under catastrophe risk condition (high-pressure oxygen-enriched), be that a cover is used for the spontaneous combustion of test gas material in high-pressure oxygen-enriched environment when heating up, assess its catching fire and the explosion hazard isolated plant under specific condition.
The invention provides the experimental provision of gas self-ignition temperature in a kind of testing high voltage oxygen-enriched environment, comprise air feed part, temperature control heating part, reactor part, safety interlock and PC, wherein, described gas supply part divides and comprises the steel cylinder that air or oxygen-enriched air are housed, the steel cylinder of gas to be measured is housed, retaining valve and needle valve, air or oxygen-enriched air, gas to be tested enters reactor part through retaining valve and needle valve by reactor cylinder body middle and lower part partly all by steel cylinder.Described temperature control heating comprises partly that with the electric heating cover of temperature controller and heat-insulation layer described electric heating cover is wrapped in the cylinder body outside, and described heat-insulation layer is wrapped in the electric electric jacket outside.Described reactor partly comprises cylinder body and ring flange, seal between cylinder body and the ring flange, described safety interlock is comprised of safety valve and solenoid valve, 6 pipelines that distributing on the described ring flange connect respectively vacuum pump, pressure transducer, temperature sensor, solenoid valve, safety valve and stirrer, effect is respectively and vacuumizes, pressure detection, temperature detection, solenoid valve are emptying, safety valve and stirring.Described PC connecting computer shrinkage temperature pressure signal carries out subsequent treatment, guarantees the experiment safety even running.
When the aerial self-ignition temperature of test gas, use air; In the test oxygen-enriched air, use oxygen-enriched air during self-ignition temperature.Described retaining valve and needle valve have two groups, and air or oxygen-enriched air enter described cylinder body through one group of retaining valve and needle valve by air or oxygen-enriched air injection port, and gas to be measured enters described cylinder body through another group retaining valve and needle valve by gas sampling mouth to be measured.
Described cylinder body has thorax in the cylinder barrel shaped, and the about 500ml of its volume, round bottom radius surface are 42mm, and height is 90mm.
Use the experimental technique of gas self-ignition temperature in the described experimental provision testing high voltage oxygen-enriched environment, step is as follows:
(1) cleans organic substance residual in the described cylinder body, drying with ethanolic solution;
(2) cylinder body and ring flange are installed, the pipeline on the mounting flange vacuumizes leak detection;
(3) under vacuum state, pass into original pressure P
0The oxygen-enriched air of 95% dividing potential drop and the gas to be measured of 5% dividing potential drop, stop after stirring 5min;
(4) heat up, 5 ± 1 ℃/min of heating rate, connecting computer shrinkage temperature, pressure signal are worked as P
0During rising 10KPa, the solenoid valve action, pressure release is to P
0
(5) when temperature rises sharply more than 20 ℃, spontaneous combustion has occured in the expression sample, after perfect combustion and being no less than 3min burning time, and the computer-controlled electromagnetic valve exhaust, stopped heating is waited for the instrument cooling simultaneously;
(6) drain gas after, clean cylinder body with oxygen-enriched air, repeating step (3) (4) then is below the spontaneous ignition temperature temperature that records near step (5) 30 degrees centigrade the time, the rate of heat addition changes 1 ± 0.5 ℃/min into, and test result is the self-ignition temperature of described gas to be measured;
(7) drain gas, stopped heating is taken ring flange apart and is cleaned inside when device is cooled to room temperature, and drying is prepared test next time and used.
In the described step (4), from the slowly situation that occurs heating up after room temperature is heated to about 250 ℃, keep heating rate 3 ℃/more than the min.
In the described step (5), in case temperature, pressure sharply raise, safety valve can take-off be discharged cylinder body with gas, at this moment, illustrates that detonation has occured gas.
The present invention passes through in confined conditions regulating system pressure, continuous warming, automatically record temperature data and judge whether to have occured nature, obtain accordingly the self-ignition temperature data, relaxed the condition determination of self-ignition temperature, and operation is simpler, and experimental implementation and data recording realize computer automation.
This device has the following advantages:
1. by the regulating system original pressure, can record the temperature of sample generation spontaneous combustion under the different condition, obtain a large amount of self-ignition temperature data, increased the measurement range of self-ignition temperature, for catching fire of particular risk occasion fire goods is described, assesses and calibrate with explosion danger.
2. test for the gas spontaneous ignition temperature.
3. connect computing machine by temperature, pressure transducer, automatic acquisition and recording data,
4. the increase safety interlock greatly reduces the danger in the experimentation
Description of drawings
Fig. 1 is the sectional view of this experimental provision, wherein, and 1, air or oxygen-enriched air injection port; 2, connect vacuum pump; 3, connect pressure transducer; 4, jointing temp sensor; 5, solenoid valve; 6, safety valve; 7, with the electric heating cover of temperature controller; 8, heat-insulation layer; 9, gas sampling mouth to be measured; 10, stirrer; 11, computer.
Embodiment
Test gas of the present invention under airtight condition and predefined pressure, the behavior of continuous warming generation spontaneous combustion, and the temperature variation by temperature and pressure transmitter and the whole process of computer recording.
Described experimental provision comprises air feed part, temperature control heating part, reactor part, safety interlock and PC, wherein,
Described gas supply part divides and comprises the steel cylinder that air or oxygen-enriched air are housed, the steel cylinder of gas to be measured is housed, retaining valve and needle valve, air or oxygen-enriched air pass through steel cylinder, enter the reactor part through retaining valve and needle valve by reactor cylinder body middle and lower part partly, gas to be tested enters reactor part through retaining valve and needle valve by reactor cylinder body middle and lower part partly by steel cylinder.
Described temperature control heating comprises partly that with the electric heating cover of temperature controller and heat-insulation layer described electric heating cover is wrapped in the cylinder body outside, and described heat-insulation layer is wrapped in the electric electric jacket outside; 60-450 ℃ of electric heating cover temperature range or higher.
Described reactor partly comprises cylinder body and ring flange etc., ring flange outward flange 6 threaded holes that evenly distribute, cylinder body is connected by 6 bolts with ring flange, between with the graphite gasket sealing, air tight with the assurance cylinder body.6 pipelines that distributing around the ring flange, effect is respectively and vacuumizes, pressure detection, temperature detection, stirring, emptying, the safety valve of solenoid valve; The temperature controller probe that connects gas sampling mouth to be measured, air or oxygen-enriched air injection port and electric heating cover on the cylinder body, the about 500ml of interior thorax volume of cylinder barrel shaped, the round bottom radius surface is 42mm, height is 90mm.
Described safety interlock is comprised of safety valve and solenoid valve, and when specimen produced the pressure rising because instrument heats up, the solenoid valve action will release above the superpressure of preset pressure P0; Pressure increases severely when the γ-ray emission spontaneous combustion, and safety valve action is to guarantee the safe operation of instrument.
Described PC connecting computer shrinkage temperature pressure signal carries out subsequent treatment, guarantees the experiment safety even running.
Need to adopt reliable vent line, experimental procedure is as follows:
1. the parts of contact gas will fully clean in the cylinder body, must wash organic substance residual in the cylinder body, drying off with ethanolic solution.
2. mounting flange, and the pipeline on the mounting flange (some pipeline needn't be dismantled) vacuumizes leak detection.
3. under vacuum state, pour original pressure P
0The oxygen-enriched air of 95% dividing potential drop, 5% gas to be measured stirs and opens, and stops to stir after stirring 5min.
4. heat up, 5 ± 1 ℃/min of heating rate, connecting computer shrinkage temperature, pressure signal are worked as P
0During rising pressure 10KPa, the solenoid valve action, pressure release is to P
0Temperature the slowly situation that heats up may occur after room temperature is heated to about 250 ℃, maintain that 3 ℃/min is above to be got final product.
5. when temperature rose sharply more than 20 ℃, burning had occured in the expression sample, after perfect combustion and being no less than 3min burning time, and the computer-controlled electromagnetic valve exhaust, stopped heating is waited for the instrument cooling simultaneously.Be protection instrument safety when temperature, pressure sharply raise, safety valve can take-off be discharged cylinder body with gas, and illustrate that spontaneous combustion even detonation have occured gas this moment.
6. after draining gas, clean cylinder body with oxygen-enriched air, repeating step 3,4 then, the rate of heat addition changes 1 ± 0.5 ℃/min into 30 degrees centigrade the time below the spontaneous ignition temperature temperature that records near step 5, and test result is the self-ignition temperature of this gas.
7. drain gas, stopped heating is taken ring flange apart and is cleaned inside when instrument is cooled to room temperature, and drying is prepared test next time and used.
Attention: tail gas may be poisonous, avoids sucking or directly contacting decomposition product during processing
The test findings assessment:
1. when temperature rose sharply more than 20 ℃, burning had occured in the expression sample, after perfect combustion and being no less than 3min burning time, and the computer-controlled electromagnetic valve exhaust, stopped heating is waited for the instrument cooling simultaneously; Spontaneous combustion or detonation have occured in explanation gas when safety valve jumping up, stopped heating, and gas is emptying, waits for the instrument cooling.
2. if reach 450 ℃ of still not burnings of maximum system safe temperature, stopped heating and relief pressure.
Claims (6)
1. the experimental provision of gas self-ignition temperature in the testing high voltage oxygen-enriched environment comprises air feed part, temperature control heating part, reactor part, safety interlock and PC, wherein,
Described gas supply part divides and comprises the steel cylinder that air or oxygen-enriched air are housed, the steel cylinder of gas to be measured is housed, retaining valve and needle valve, air or oxygen-enriched air, gas to be tested enters reactor part through retaining valve and needle valve by reactor cylinder body middle and lower part partly all by steel cylinder;
Described temperature control heating comprises partly that with the electric heating cover of temperature controller and heat-insulation layer described electric heating cover is wrapped in the cylinder body outside, and described heat-insulation layer is wrapped in the electric electric jacket outside;
Described reactor partly comprises cylinder body and ring flange, seal between cylinder body and the ring flange, described safety interlock is comprised of safety valve and solenoid valve, 6 pipelines that distributing on the described ring flange connect respectively vacuum pump, pressure transducer, temperature sensor, solenoid valve, safety valve and stirrer, effect is respectively and vacuumizes, pressure detection, temperature detection, solenoid valve are emptying, safety valve and stirring;
Described PC connecting computer shrinkage temperature pressure signal carries out subsequent treatment, guarantees the experiment safety even running.
2. experimental provision as claimed in claim 1, it is characterized in that, described retaining valve and needle valve have two groups, air or oxygen-enriched air enter described cylinder body through one group of retaining valve and needle valve by air or oxygen-enriched air injection port, and gas to be measured enters described cylinder body through another group retaining valve and needle valve by gas sampling mouth to be measured.
3. experimental provision as claimed in claim 1 is characterized in that, described cylinder body has thorax in the cylinder barrel shaped, and the about 500ml of its volume, round bottom radius surface are 42mm, and height is 90mm.
4. use arbitrary such as claim 1-3 as described in the experimental technique of experimental provision,
(1) cleans organic substance residual in the described cylinder body, drying with ethanolic solution;
(2) cylinder body and ring flange are installed, the pipeline on the mounting flange vacuumizes leak detection;
(3) under vacuum state, pass into original pressure P
0The oxygen-enriched air of 95% dividing potential drop and the gas to be measured of 5% dividing potential drop, stop after stirring 5min;
(4) heat up, 5 ± 1 ℃/min of heating rate, connecting computer shrinkage temperature, pressure signal are worked as P
0During rising 10KPa, the solenoid valve action, pressure release is to P
0
(5) when temperature rises sharply more than 20 ℃, spontaneous combustion has occured in the expression sample, after perfect combustion and being no less than 3min burning time, and the computer-controlled electromagnetic valve exhaust, stopped heating is waited for the instrument cooling simultaneously;
(6) drain gas after, clean cylinder body with oxygen-enriched air, repeating step (3) (4) then is below the spontaneous ignition temperature temperature that records near step (5) 30 degrees centigrade the time, the rate of heat addition changes 1 ± 0.5 ℃/min into, and test result is the self-ignition temperature of described gas to be measured;
(7) drain gas, stopped heating is taken ring flange apart and is cleaned inside when device is cooled to room temperature, and drying is prepared test next time and used.
5. experimental technique as claimed in claim 4 is characterized in that: in the described step (4), from the slowly situation that occurs heating up after room temperature is heated to about 250 ℃, keep heating rate 3 ℃/more than the min.
6. experimental technique as claimed in claim 4 is characterized in that: in the described step (5), in case temperature, pressure sharply raise, safety valve can take-off be discharged cylinder body with gas, at this moment, illustrates that detonation has occured gas.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104614400A (en) * | 2015-01-16 | 2015-05-13 | 徐州泰瑞仪器设备有限公司 | Piston type temperature-constant calorimeter |
| CN105092641A (en) * | 2015-08-14 | 2015-11-25 | 中国石油化工股份有限公司 | Test device and test method of spontaneous ignition point of gas or liquid in high pressure oxygen-enriched environment |
| CN106979903A (en) * | 2017-03-24 | 2017-07-25 | 北京科技大学 | A kind of analysis method tested for ferrous materials spontaneous combustion with oxygen-enriched erosion |
| 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 |
| CN108107115A (en) * | 2018-01-30 | 2018-06-01 | 辽宁工程技术大学 | A kind of high pressure resistant coal petrography absorption damage deformation-acoustic-electric combined monitoring experimental rig |
| CN111650245A (en) * | 2020-07-10 | 2020-09-11 | 天津大学 | System and method for testing flameless combustion spontaneous combustion temperature of combustible gas in high-pressure environment |
| CN111796051A (en) * | 2020-07-10 | 2020-10-20 | 天津大学 | Flameless combustion spontaneous combustion temperature testing device, system and method |
| CN112083038A (en) * | 2019-06-12 | 2020-12-15 | 株式会社岛津制作所 | Spontaneous combustion test device |
| CN112083027A (en) * | 2019-06-12 | 2020-12-15 | 株式会社岛津制作所 | Spontaneous combustion test device |
| CN112577990A (en) * | 2019-09-29 | 2021-03-30 | 中国石油化工股份有限公司 | Device for measuring ignition delay time of gas |
| CN112577996A (en) * | 2019-09-29 | 2021-03-30 | 中国石油化工股份有限公司 | Experimental device for combustible gas explosion limit under survey high temperature condition |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104614400B (en) * | 2015-01-16 | 2017-06-23 | 张洪 | A kind of piston type constant temperature calorimeter |
| CN104614400A (en) * | 2015-01-16 | 2015-05-13 | 徐州泰瑞仪器设备有限公司 | Piston type temperature-constant calorimeter |
| CN105092641B (en) * | 2015-08-14 | 2019-01-08 | 中国石油化工股份有限公司 | Gas or liquid self-ignition point test device and test method under high-pressure oxygen-enriched environment |
| CN105092641A (en) * | 2015-08-14 | 2015-11-25 | 中国石油化工股份有限公司 | Test device and test method of spontaneous ignition point of gas or liquid in high pressure oxygen-enriched environment |
| CN106979903A (en) * | 2017-03-24 | 2017-07-25 | 北京科技大学 | A kind of analysis method tested for ferrous materials spontaneous combustion with oxygen-enriched erosion |
| 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 |
| CN108107115A (en) * | 2018-01-30 | 2018-06-01 | 辽宁工程技术大学 | A kind of high pressure resistant coal petrography absorption damage deformation-acoustic-electric combined monitoring experimental rig |
| CN112083038A (en) * | 2019-06-12 | 2020-12-15 | 株式会社岛津制作所 | Spontaneous combustion test device |
| CN112083027A (en) * | 2019-06-12 | 2020-12-15 | 株式会社岛津制作所 | Spontaneous combustion test device |
| CN112577990A (en) * | 2019-09-29 | 2021-03-30 | 中国石油化工股份有限公司 | Device for measuring ignition delay time of gas |
| CN112577996A (en) * | 2019-09-29 | 2021-03-30 | 中国石油化工股份有限公司 | Experimental device for combustible gas explosion limit under survey high temperature condition |
| CN111650245A (en) * | 2020-07-10 | 2020-09-11 | 天津大学 | System and method for testing flameless combustion spontaneous combustion temperature of combustible gas in high-pressure environment |
| CN111796051A (en) * | 2020-07-10 | 2020-10-20 | 天津大学 | Flameless combustion spontaneous combustion temperature testing device, system and method |
| CN111650245B (en) * | 2020-07-10 | 2022-11-04 | 天津大学 | Combustible gas flameless combustion spontaneous combustion temperature testing system and method in high-pressure environment |
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Application publication date: 20130213 |