The 1000L Spherical Explosion Test System is used to determine the maximum pressure Pmax and maximum pressure rise rate (dp/dt)max of dust cloud explosion under set test conditions, as well as the minimum concentration MEC and limiting oxygen concentration LOC of dust cloud explosion, and to evaluate the explosion hazard of dust cloud (1m3 spherical explosion test; one cubic meter ball; Kst explosion index; dust cloud explosion test; Pmax maximum explosion pressure; one cubic meter spherical explosion test; dust explosion test; explosion pressure rise rate; minimum explosion concentration; ignition delay time; LOC; MEC; limiting oxygen concentration).
The 1000L Spherical Explosion Test System is an international standard explosive parameter test device. The test results obtained using this system can be directly applied to dust explosion safety assessment and factory safety control without processing. The system diffuses the dust sample in the 5.4L powder storage chamber into a 1000L ball through 20 bar compressed air, ignites the dust cloud using a chemical ignition head, measures the changes in pressure and time to obtain a curve, and determines the maximum explosion pressure and maximum pressure rise rate for each test. A series of tests are carried out on various concentrations in a wide range to find the maximum values of Pm and (dP/dt)m, namely Pmax and (dP/dt)max. This test complies with the requirements of EN14034-1/2/3/4, ASTM E1226, BS 6713, ISO 6184.Part 1 (1985) (Explosion Prevention Systems. Part 1: Test Method for Explosion Index of Combustible Dust in Air) and GB/T 16426.
Dust explosion hazards lurk in powder handling operations, and their effects can be catastrophic, leading to huge property losses and serious threats to human life. A comprehensive understanding of flammability, ignition sensitivity and explosion intensity is the guarantee for safe handling of dust. Laboratory testing is an important part of the qualitative and quantitative analysis of the relevant parameters.
Technical Parameters:
1.Explosion chamber: Volume 1m3, the chamber is made of special steel. Maximum operating pressure 30 bar, maximum test pressure 40 bar. The chamber has dust diffusion port, air inlet and exhaust port, air distribution input port, armored glass viewing window, ignition device interface, temperature sensor interface, pressure sensor interface, flash detector interface, vacuum port, reserved port, connection flange and ring lock.
2. Explosion hatch: The opening and closing of the explosion hatch is controlled by a hydraulic system, 4 position sensors and 2 hatch switch buttons.
3. Dust diffusion container: capacity 5.4L, the container is equipped with a position sensor to ensure that the diffusion container is completely sealed.
4. Dust diffusion quick start valve: It can completely diffuse the dust into the cabin, maximizing the accuracy of the test results and their consistency with the actual working conditions.
5. Dust diffuser: semicircular porous diffuser, rebound nozzle, diffuser cup. Three types of diffusers are suitable for various sample tests.
6. Vacuum system: The vacuum rate is 40 m3/h. The explosion chamber is vacuumed. The quick pneumatic valve controls the opening or closing of the vacuum port. The filter can remove impurities in the gas to avoid damage to the vacuum pump.
7. Automatic gas distribution system: The software fully automatically controls the accurate gas distribution and inputs the target gas into the explosion chamber without manual intervention.
8. Inlet and outlet: The pneumatic valve and position sensor automatically control their correct opening and closing. The special sealing structure can ensure that there is no gas leakage. The gas products after the experiment can be discharged out of the cabin or collected for analysis, and compressed air can be connected to flush the cabin.
9. Ignition device: Installed on the top of the explosion chamber, it consists of two ignition electrodes and can be connected to a chemical ignition head for ignition.
10. High frequency pressure sensor: 0-250 bar, working temperature -150—200 ℃.
11. Explosion pressure test channels: 2, to ensure accurate and effective collection of pressure signals from the explosion system.
12. Flash detector: records the duration of flash during explosion or combustion process.
13. Armored glass viewing window: It can be installed with high-speed cameras or other optical electronic equipment to study the propagation of detonation waves during explosions or the propagation of flames during combustion.
14. Operating software: Professional operating software, easy to use, user-friendly interface, powerful functions. Through the main and auxiliary control boxes, the instrument is automatically controlled to carry out explosion tests, data collection and analysis, and the test report is automatically generated after the test is completed.
15. Weight: 2000Kg.
Standards
ASTM E1226: Standard Test Method for Explosibility of Dust Clouds
ASTM E1515: Standard Test Method for MEC - minimum explosible concentration of combustible dusts
EN 14034-1: Determination of the maximum explosion pressure Pmax of dust clouds
EN 14034-2: Determination of the maximum rate of explosion pressure rise (dp/dt)max of dust clouds
EN 14034-3: Determination of the lower explosion limit LEL of dust clouds
EN 14034-4: Determination of the limiting oxygen concentration LOC of dust clouds
EN ISO/IEC 80079-20-2: Explosive atmopheres. Material characteristics. Combustible dust methods
EN ISO/IEC 80079-20-2
GB/T 16425
GB/T 16426
GB/T 803
ISO/IEC 6184/1
ISO/IEC 6184/2
ISO/IEC 80079-20-2
