Minimum electrostatic ignition energy for flammable gases and flammable liquid vapors

Applicable standards:

GB/T 14288-1993Minimum electrostatic ignition energy for flammable gases and flammable liquid vaporstest method

GB/T 21844 Standard Test Method for Flammability Concentration Limits of Compounds (Vapors and Gases)

GB/T 12474-2008 Determination of Explosive Limits of Combustible Gases in Air

Scope of application:

1、Minimum electrostatic ignition energy for flammable gases and flammable liquid vaporstest

2FlammableGas andFlammable liquid vapor explosion limit test, maximum explosion pressure and maximum pressure rise rate test, explosion indextest

3FlammableLiquid gas-liquid two-phase systemMinimum electrostatic ignition energy test, flammability concentration limit, maximum explosion pressure, and maximum pressure rise rateTesting and explosion index testing.

4Carry outNormal temperature and high temperatureMinimum static ignition energy test, explosion limit test, and explosion index test in the environment.

Technical Indicators:

1Integrated control system:
1.1 Adopting computer automatic control;
1.2 Automatic experiment: The instrument can automatically complete the entire experiment according to the set value;
1.3 Manual test: All components related to the test can be individually controlled by the corresponding manual button,The entire experiment can be completed manually;
1.4 Capable of detecting environmental temperature, humidity, and atmospheric pressure.
2, Conclusion Structure:
2.1 Adopting anti explosion impact stainless steel inner liner;
2.2 Explosive container:5LGlass ball type explosive container, resistant to impact pressure not less than1.2MPa；

2.3 Observation window: The front is equipped with a double-layer transparent ultra large explosion-proof observation window, which can observe the explosion situation inside the transparent explosive ball.

3Constant temperature system: enclosed circulation space, internal heating circulation components, PID temperature measurement and control.

3.1Temperature measurement range:0～200℃ Resolution: 0.1℃ accuracy class0.1%FS；

3.2Constant temperature range: room temperature~ 160℃； Constant temperature accuracy: ±1℃ Resolution: 0.1℃ accuracy class0.1%FS；
3.3Heating method: infrared radiation heating, hot air circulation.

4Test conditions:

4.1Initial pressure: local atmospheric pressure

4.2Test temperature: Room temperature~ 1660℃

4.3真 空 度：0～100 kPa

4.4Circulating mixing time:0～999In seconds.

4.5Gas sample injection volume:0～100%(Gas (Sample)1+sample2+sample3）The sum of injection quantities ≤100%）.

4.6Liquid sample:0～100ml.

5Gas distribution system and injection system:

5.1 PrecisionGas distribution system:Adopting the pressure division method for automatic gas distribution technology to achieve multi-channel gas automatic distribution, equipped with independent precision gas distribution pressure sensors and valves, with a gas distribution accuracy of ± 0.1%

Invention specializationli(Measurement Device and Operating Method for Limiting Oxygen Concentration Parameters of Combustible Gases)

specialliNumber: ZL 2017 1 0443836.2

specialliRights holder: Jilin Hongyuan Scientific Instrument Co., Ltd./Tianjin Fire Research Institute of the Ministry of Emergency Management (formerly Tianjin Fire Research Institute of the Ministry of Public Security)

5.1.1Measurement range of valve pressure:0～100 kPa(Absolute pressure) Resolution:0.1 kPa Accuracy level:0.1%FS
5.1.2Gas distribution method: vacuum proportional gas distribution, gas distribution accuracy:0.1%
5.1.3Number of gas distribution channels:4Road（3Road samples,1Road air) Gas sample1、2、3Injection volume:0-100%

Note: Gas (sample)1+sample2+sample3）The sum of injection quantities ≤100%
5.2 Liquid sample: manually added, injection volume0～100ml

6Vacuum system:
6.1 Vacuum degree: less than300Pa
6.2 System sealing:5Minute pressure rise ≤300Pa

7Explosion detection system:Adopting dual detection of pressure and temperatureLi technology automatically determines whether an explosion has occurred by judging the pressure and temperature changes inside the explosion ball.

Invention of specialized technology "A mixed gas explosive on-site testing device and measurement method"

specialliNumber: ZL 2017 1 0831664.6

specialliRights holder: Jilin Hongyuan Scientific Instrument Co., Ltd./Tianjin Fire Research Institute of the Ministry of Emergency Management (formerly Tianjin Fire Research Institute of the Ministry of Public Security)

7.1By using pressure detection and temperature detection, the pressure and temperature changes inside the explosion ball are automatically determined to determine whether an event has occurredExplosion.

7.2Explosion parameter synchronous acquisition and data processing system: synchronous data acquisition system, using dedicated explosion detection sensors and high-speedFlame temperature sensor, automatically collects explosion pressure and explosion flame temperature data, and automatically drawsMake BaoExplosion pressure/Flame temperature -Time curve, data can be transferred toEXCEL,Further analysis and processing will be conducted.

7.2.1Explosion pressure detection range: -0.1～2.0MPa Resolution:0.001MPa precision0.25%FS

Configuration: Standard configuration1Support high-speed pressure sensor

7.2.2Flame temperature detection range:0～1200℃ Resolution:1℃ precision0.25%FS
Configuration: Standard configuration1High speed flame temperature sensor

7.2.3Synchronous acquisition system: Synchronous acquisition channel:2通道 Data sampling interval:0.2ms, Maximum Samplingtime: 6S

8Ignition system:

8.1Ignition method: Continuous pulse ignition, circuit discharge, minimal external interference.

8.2Trigger method:

8.2.1Delayed triggering, delayed ignition time:0～9999ms；

8.2.2External triggering,5V TTLLevel, high level is effective;

8.2.3Wireless remote control triggered, wireless remote control distance greater than30Rice.

8.3Electric spark energy:0.01mJ～200 mJ

Gradient of increasing energy:0.01 mJ～10 mJIn continuous mode, the ignition energy increases in gradient with each external signal trigger

8.4 Pulse ignition voltage:15 KV

8.5 Pulse ignition frequency:20kHz

8.6 Electrode spacing:2～8mm

9Mixing system:

9.1Adopting anti explosion impact and high-temperature resistant magnetic stirring components;

9.2 Circulating mixing time:0～999In seconds.

10Observation method: It can be observed through the front double-layer transparent explosion-proof door5LThe explosion situation inside the glass explosion container.
11Security protection system:

11.1 Install a large-diameter pressure relief device connected to the top of the explosive ball;

11.2 Configure a front double-layer transparent explosion-proof door with strong locking (with locking detection function, the explosion-proof door cannot start the test without being locked).

12, Show Display: Color capacitive touch screen

13Workstation: Laptop( CPU-I5 memory4G hard disk500G )

14Environmental monitoring: used to monitor the safe operating conditions of environmental temperature, humidity, and air pressure of electronic components inside the equipment, and is not used as a judgment of experimental conditions.

Atmospheric pressure measurement range: 80～110.0kPa Resolution:0.1 kPa

Environmental temperature measurement range: -40～80℃ Resolution:0.1℃

Range of environmental humidity measurement: 0～100%RH Resolution:0.1%RH

15Electricity Source:220±10％V AC 50Hz±2Hz

16Working environment:

Ambient temperature10～40℃

ambient humidity:5%～85%RH