CN101692081B - Device for testing minimum ignition energy of combustible gas or vapor - Google Patents
Device for testing minimum ignition energy of combustible gas or vapor Download PDFInfo
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- CN101692081B CN101692081B CN 200910177253 CN200910177253A CN101692081B CN 101692081 B CN101692081 B CN 101692081B CN 200910177253 CN200910177253 CN 200910177253 CN 200910177253 A CN200910177253 A CN 200910177253A CN 101692081 B CN101692081 B CN 101692081B
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Abstract
The invention discloses a device for testing the minimum ignition energy of combustible gas or vapor, which comprises a combustible mixed gas configuration system, a reactor and an ignition energy control system, wherein the combustible mixed gas configuration system further comprises an air cylinder, a combustible gas cylinder, a temperature control system, a gas mixer and a vacuum pump. When the device is used, combustible gas or vapor and the air are mixed by the gas mixer and enter the reactor. The reactor further comprises a reaction container, an electrode, a safety valve and a heat insulation system, wherein the reaction container is made of organic glass; and the distance of the electrode can be adjusted. The device for testing the minimum ignition energy of the combustible gas or the vapor can accurately test the minimum ignition energy of the combustible gas or the vapor and provide parameter data of the blasting performance of the combustible gas.
Description
Technical field
The present invention relates to gas Detonating Characteristics detection technique field, particularly a kind of inflammable gas or steam device for testing minimum ignition energy.
Background technology
The pacing items that inflammable gas or liquid vapors fire be combustable gas concentration in combustion limit, the incendiary source of certain density oxygenant (being generally oxygen) and enough energy.
Minimum ignition energy (Minimum Ignition Energy) refers to cause the burning of finite concentration combustible or the needed minimum energy value of exploding, it is the important parameter of weighing inflammable gas or liquid vapors (or combustible dust) explosion hazard, also be the important parameter of electrostatic safety, can be the control of the danger such as inflammable gas or steam burn, blast and the reference that control provides usefulness.Because inflammable gas or liquid vapors have inflammable and explosive characteristics, its corresponding minimum ignition energy value is less, therefore, must accurately measure its minimum ignition energy value, and when real work, to be strict controlled in below the minimum ignition energy value, to ensure safety in production.As seen, the accurate measurement of inflammable gas or liquid vapors minimum ignition energy has very important significance.
Summary of the invention
The invention discloses a kind of inflammable gas or steam device for testing minimum ignition energy, mainly comprise flammable mixed gas configuration-system, reactor and ignition energy control system, this device is used for the minimum ignition energy of inflammable gas or steam accurately to be tested.
For solving the problems of the technologies described above, the invention provides a kind of inflammable gas or steam device for testing minimum ignition energy, comprising: flammable mixed gas configuration-system, reactor and ignition energy control system.
Described flammable mixed gas configuration-system may further include: air gas cylinder, inflammable gas gas cylinder, temperature control system, gas mixer and vacuum pump.
Described flammable mixed gas configuration-system also may further include: air gas cylinder, steam generator, temperature control system, gas mixer and vacuum pump.
Described device in use, inflammable gas or steam and oxygen enter described reactor after mixing through described gas mixer.
Described reactor may further include: reaction vessel, electrode, safety valve and heat-insulation system.
Described reaction vessel is preferably the reaction vessel of organic glass material.
Described electrode is preferably the adjustable electrode of distance.
Described ignition energy control system is used for realization ignition energy regulation and control, and it may further include: DC power-supply system and energy adjustment control device.
Described air gas cylinder in use the splendid attire air humidity preferably less than 30%; In the described gas mixer stirrer can be set further, described stirrer is mechanical raking, stirring frequency 0-400rpm.
Described temperature control system temperature control scope is preferably 25-100 ℃; Described reactor is preferably pmma material, and volume is preferably 0.5L, and maximum is born pressure and is preferably 200kPa; Described electrode can be arranged at described reactor two ends, and described electrode gap is preferably adjustable, and described electrode material is stainless steel, and its diameter is 0.3mm, and its tip curvature radius is 6 * 10
-3Mm.
Inflammable gas of the present invention or steam device for testing minimum ignition energy can the Measurement accuracy inflammable gass or the minimum ignition energy of steam, and the explosive characteristic supplemental characteristic of inflammable gas is provided.
Description of drawings
Fig. 1 is the described inflammable gas of the embodiment of the invention or steam device for testing minimum ignition energy schematic diagram.
Embodiment
As shown in Figure 1, be the described inflammable gas of the embodiment of the invention or steam device for testing minimum ignition energy schematic diagram.Wherein, described inflammable gas or steam device for testing minimum ignition energy comprise: ignition energy control set for adjusting 1, air gas cylinder 2, combustible gas gas cylinder 3, steam generator 4, gas sampling analyser 5, vacuum meter 6, tensimeter 7, thermometer 8, pressure display instrument 9, safety valve 10, electrode 11, gas mixer 12, temperature control system 13, vacuum pump 14, reactor 15.
Device for testing minimum ignition energy mainly is comprised of flammable mixed gas configuration-system, reactor and ignition energy control system three parts.Flammable mixed gas configuration-system mainly is comprised of air gas cylinder, inflammable gas gas cylinder or steam generator, temperature control system, gas mixer, vacuum pump etc.Inflammable gas or steam and oxygen enter flammable hybrid gas reactor after mixing through gas mixer, and reactor is mainly by reaction vessel (organic glass material), form apart from adjustable electrode, safety valve, heat-insulation system.The ignition energy control system mainly realizes the ignition energy regulation and control, mainly comprises DC power-supply system, energy adjustment control device.
Described inflammable gas or steam device for testing minimum ignition energy possess following condition:
Air bottle splendid attire air humidity requires less than 30%;
Select the inflammable gas gas cylinder that flammable source of the gas is provided for inflammable gas, then select steam generator that the combustible vapor source of the gas is provided for the flammable liquid steam;
Inflammable gas mixer volume is 40L;
Stirrer in the gas mixer is mechanical raking, stirring frequency 0-400rpm;
25-100 ℃ of temperature control system temperature control scope;
Reactor is pmma material, and volume is 0.5L, and maximum is born pressure 200kPa;
Electrode is equipped with at the reactor two ends, and the two end electrodes gap is adjustable, and electrode material is stainless steel, and electrode diameter is 0.3mm, and the tip curvature radius is 6 * 10
-3Mm;
Gas concentration utilizes dividing potential drop to calculate in the mixer;
The electric firing lock sequential is utilized programming controller control.
Testing procedure and method:
1) install spark electrode, regulate electrode position and interelectrode gap (general 0.5～2.5mm), electrode and electric ignition system are connected;
2) connect each inlet/outlet pipeline such as steam generator, mixer, reactor;
3) choose suitable condenser capacity (general 5～100pF) according to institute's test specimens ignition energy size;
4) check whether circuit instrument and each system be intact, and gas distributing system has or not gas leak phenomenon;
5) gas evaporator, gas mixer, gas reactor and respective lines are vacuumized, then close respective valves;
6) for liquor sample, at first in steam generator, add a certain amount of liquid, the start liquid evaporator produces enough steam;
7) open the outlet valve of inflammable gas gas cylinder or liquid evaporator, adopt minute platen press to allot the inflammable gas of desired concn or the combination gas of steam, in order to prevent the liquid vapors condensation, need heat mixer and are incubated;
8) mixer that configures is introduced in the reactor, same reactor need carry out control and the adjusting of temperature;
9) fixedly discharge capacity and experimental gas concentration only change electrode gap, by repeatedly measuring really
Make the sensitive electrode gap width;
10) fixed gas concentration is fixed on the sensitive electrode gap width with the sparking electrode gap, only changes discharge capacity, determines responsive discharge capacity value by Measurement and analysis repeatedly;
11) discharging gap is transferred to the sensitive electrode gap width, discharge capacity is fixed on responsive discharge capacity value, only changes the concentration value of experimental gas in the explosion limits scope, determines responsive gas concentration value by many experiments;
12) under the sensitive experiment condition in the sensitive concentration of inflammable gas or flammable liquid steam, responsive discharge capacity and sensitive electrode gap, select first a sparking voltage that is enough to blasting test gas, then gradually reduce and (reduce the magnitude of voltage on 100～250V) storage capacitors at every turn, on each magnitude of voltage, all carry out 25 times discharge test, until 25 discharges all can not light till the test gas, the corresponding ignition energy of minimum point ignition voltage of lighting this gas in above-mentioned all experiment is minimum ignition energy;
13) by step 12) revision test, until record for three times minimum light voltage deviation less than 100～250V till, get at last and minimumly in three times light the minimum ignition energy that voltmeter is calculated test gas.
After determining the minimum point ignition voltage of experimental gas, formula carries out minimum ignition energy (E below utilizing
Min) calculate:
Wherein, the minimum point ignition voltage of V for determining by 25 experiments, V;
C
0Be the sensitization capacitance amount that experiment is determined, pF.
Claims (4)
1. an inflammable gas or steam device for testing minimum ignition energy comprise:
Flammable mixed gas configuration-system, reactor and ignition energy control system;
Described flammable mixed gas configuration-system further comprises: air gas cylinder, inflammable gas gas cylinder temperature control system, gas mixer and vacuum pump;
Described reactor further comprises: reaction vessel, electrode, safety valve and heat-insulation system;
Described electrode is arranged at described reactor two ends, and described electrode gap is adjustable, and described electrode material is stainless steel;
It is characterized in that,
Described inflammable gas gas cylinder temperature control system temperature control scope is 25-100 ℃; Described reactor is pmma material, and volume is 0.5L, and maximum is born pressure 200kPa; Described electrode diameter is 0.3mm, and its tip curvature radius is 6 * 10
-3Mm.
2. according to claim 1 described inflammable gas or steam device for testing minimum ignition energy is characterized in that, described device in use, inflammable gas or steam enter described reactor with after air mixes through described gas mixer.
3. according to claim 1 described inflammable gas or steam device for testing minimum ignition energy is characterized in that, described ignition energy control system is used for realizing the ignition energy regulation and control, and it further comprises: DC power-supply system and energy adjustment control device.
4. according to claim 1 described inflammable gas or steam device for testing minimum ignition energy is characterized in that, described air gas cylinder in use the splendid attire air humidity less than 30%; Stirrer further is set in the described gas mixer, and described stirrer is mechanical raking, stirring frequency 0-400rpm.
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| CN 200910177253 CN101692081B (en) | 2009-09-28 | 2009-09-28 | Device for testing minimum ignition energy of combustible gas or vapor |
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| CN 200910177253 CN101692081B (en) | 2009-09-28 | 2009-09-28 | Device for testing minimum ignition energy of combustible gas or vapor |
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| CN101692081B true CN101692081B (en) | 2013-04-10 |
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| CN104749217B (en) * | 2015-03-27 | 2018-06-05 | 中国石油大学(华东) | Flammable gas explosion minimum ignition energy tests system and method under ultralow temperature |
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| CN107782480B (en) * | 2017-11-17 | 2023-08-29 | 北京石油化工学院 | Method and device for testing minimum ignition energy of combustible dust/combustible gas mixture |
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| CN108627608A (en) * | 2018-03-28 | 2018-10-09 | 东北大学 | Ignition of flammable vapour sensibility tubular type test device and test method under flow regime |
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| CN111881588B (en) * | 2020-07-30 | 2023-10-03 | 重庆大学 | Explosion risk quantification method based on minimum ignition energy |
| CN112610981A (en) * | 2020-11-30 | 2021-04-06 | 昆山莫帝斯科燃烧技术仪器有限公司 | Device for testing dust ignition energy |
| CN115728438B (en) * | 2022-11-18 | 2024-05-28 | 天津大学 | Device and method for testing combustion characteristics of variable ignition energy working medium |
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| RU2293309C1 (en) * | 2005-08-15 | 2007-02-10 | Российская Федерация,от имени которой выступает государственный заказчик - Федеральное агентство по атомной энергии | Device for determining minimal ignition energy of explosive materials from spark discharges |
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