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Jilin Hongyuan Scientific Instrument Co., Ltd

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Building A, No. 55 Jilin Street, High tech Zone, Jilin City

Low temperature and low pressure explosion limit test device

NegotiableUpdate on 05/06

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Overview

HY21844L Low Temperature and Low Pressure Explosion Limit Test Device $r $n This device integrates mechanical technology, embedded technology, and computer technology, and is used to test the maximum concentration (or highest concentration) of a mixture of chemical vapor and air under low temperature and low pressure conditions that can ignite or explode when exposed to a fire source, and evaluate the potential explosion hazard of chemical substances. The automatic constant temperature, vacuum pumping, automatic proportional gas distribution, automatic stirring, automatic ignition, and automatic explosion detection during the experimental process are all automatically completed by the device.

Product Details

HY21844LLow temperature and low pressure explosion limit test device

Applicable standards:

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

GB/T 803-2008 Determination of Explosion Index of Combustible Gases in Air

Main functions:

1. Testing the explosion limit of combustible gases under low temperature and low pressure conditions, as well as testing the maximum explosion pressure and maximum pressure rise rate.

2. Testing of the explosion limit, maximum explosion pressure, and maximum pressure rise rate of flammable liquid saturated vapor under low temperature and low pressure conditions.

3. Testing of Flammability Concentration Limits, Maximum Explosion Pressure, and Maximum Pressure Rise Rate for Gas Liquid Two Phase Flammability of Combustible Liquids under Low Temperature and Low Pressure Conditions.

4. Simulate explosion characteristics tests of combustible gases, volatile liquid saturated vapors, and gas-liquid two-phase mixtures under high altitude or high-altitude conditions (low ambient temperature, low atmospheric pressure).

Technical Indicators:

1、 Simulation conditions for the internal environment of explosive containers:

1. Environmental pressure control system

1.1 Pressure measurement range: 0kPa~102kPa (absolute pressure)

Resolution: 0.1 kPa, Accuracy: 0.1% FS

1.2 Pressure control range: 1kPa to atmospheric pressure

1.3 Sealing: Under a pressure of 10 kPa, the pressure rise within 5 minutes is less than 300 Pa

2. Environmental temperature control system:

2.1 Temperature measurement range: -100 ℃ to 100 ℃ Resolution: 0.1 ℃

2.2 Temperature control range: -40 ℃ to 60 ℃

2.3 Temperature control stability: Static temperature stability: ± 1 ℃ Dynamic temperature stability: ± 2.0 ℃

2.4 Cooling method: External stacked compressor cooling, maximum cooling depth -65 ℃

3. Environmental atmosphere control system:

3.1 Environmental atmosphere control adopts the partial pressure method to adjust the environmental atmosphere through proportional air distribution, sharing one pressure sensor with the environmental pressure control system, with a ratio accuracy of ± 0.1%.

3.2 Measurement range of environmental atmosphere pressure:

Range: 0-100 kPa (absolute pressure) Resolution: 0.1 kPa Accuracy: 0.1% FS

2、 Explosion limit testing unit:

1. Explosive container: 5L glass ball type explosive container, with an impact pressure resistance of not less than 1.2MPa

5L stainless steel spherical explosive container, resistant to impact pressure of 4MPa (optional)

2. Experimental conditions:

2.1 Initial pressure: 2kPa~101kPa

2.2 Test temperature: -40 ℃ to 60 ℃

2.3 Vacuum degree: 0-100 kPa

2.4 Cycle mixing time: 0-9999 seconds.

3. Gas distribution system and injection 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 patent: "Measurement device and operating method for limit oxygen concentration parameters of combustible gases"

Special Li Number: ZL 2017 1 0443836.2

Exclusive rights 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)

3.1 Valve pressure measurement range: 0-100kPa (absolute pressure) resolution: 0.01 kPa accuracy level: 0.1% FS

3.2 Gas distribution method: Automatic gas distribution is achieved using precision proportional gas distribution technology using partial pressure method, with a gas distribution accuracy of 0.1%

3.3 Number of Gas Distribution Channels: 4

The sum of sample 1+sample 2+sample 3+sample 4 injection amounts is 100%

4. Saturated vapor injection: Equipped with a 1L saturated vapor generation device and dedicated injection components, it can conduct experiments on the explosion limit and explosion parameters of multi-component liquid mixtures saturated vapor, avoiding the impact of vapor liquefaction reflux after gasification on injection accuracy.

5. Same liquid sample injection: manual injection, injection volume 0-100ml

6. Wide temperature magnetic stirring system: using anti explosion impact, high and low temperature resistant magnetic stirring components.

6.1 Working temperature range: -80~350 ℃

6.2 Mixing speed: 0-450 r/min

6.3 Mixing time: 0-9999S

7. Ignition system: equipped with electric spark ignition system and ultra-high temperature platinum thermal ignition system

7.1 Electric spark ignition system

7.1.1 Electrostatic voltage 15KV, arc current: 30mA

7.1.2 Ignition time: 1-1000ms

7.1.3 Electrode spacing: 2-8mm

7.2 Ultra high temperature platinum thermal ignition system: equipped with HY180B high-temperature platinum thermal ignition device, to avoid the formation of corona in the electrode medium space of the electric spark ignition system under low test pressure, which cannot generate electric sparks.

7.2.1 Platinum ignition temperature: ≥ 1300 ℃

8. Vacuum system:

8.1 Vacuum device: 2L rotary vane vacuum pump, maximum vacuum 2 Pa

8.2真空度：5-minute pressure rise ≤ 300Pa

9. Integrated control and explosion detection system

9.1 Explosion detection system:Adopting dual detection technology of pressure detection and temperature detection, it 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"

Special Li Number: ZL 2017 1 0831664.6

9.2 Explosion parameter synchronous acquisition and data processing system: equipped with a 6-channel high-speed synchronous data acquisition system, using dedicated high-speed pressure sensors and high-speed flame temperature sensors to automatically collect explosion pressure and explosion flame temperature data, and automatically drawMake BaoExplosion pressure/flame temperature time curve, data can be saved to EXCEL for further analysis and processing.

9.2.1 Explosion pressure detection range: 0-2MPa (absolute pressure) resolution: 0.001MPa accuracy: 0.25% FS

9.2.2 Flame temperature detection range: 0-1200 ℃ Resolution: 1 ℃ Accuracy: 0.25% FS

9.2.3 Synchronous acquisition system: 2-channel synchronous acquisition, data sampling rate: 5kSPS, maximum sampling time: 5S

3、 Sampling system: Sampling of reaction residues inside explosive containers using specialized sampling devices. Optional

3.1 Sampling pressure: 10 kPa to 101 kPa (absolute pressure)

3.2 Sampling volume: 0-100ml

4、 Integrated Integrated Control System:

4.1 Controller Core: Mixed Signal Processor

4.2 Display: 8-inch color capacitive touch screen

4.3 Power Supply: 220 ± 10% V AC 50Hz ± 2Hz Power: 3000W

4.4 Working environment:

Environmental temperature: 10-40 ℃

Environmental humidity: 5% to 85% RH

HY21844L Low Temperature and Low Pressure Explosion Limit Test Device