We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Energy Release Characteristic Law of MgH<sub>2</sub> Dust Explosion.
- Authors
ZHANG Yun; ZHAO Yi-ming; XU Zhang-gui; ZHAO Feng-qi; XU Si-yu; PEI Qing; XU Sen; JIAO Feng-yuan; WU Xing-liang; JIA Xian-zhen; CAO Wei-guo
- Abstract
To explore the energy release characteristic of MgH2 dust, a modified 20L sphere explosion venting device was used to obtain its explosion pressure and flame propagation. The applicability of the current industrial dust explosion venting standard to the safety design of MgH2 explosion venting was analyzed. The results show that under airtight conditions, with the increase in dust concentration, the explosion pressure of MgH2 dust increases first and then decreases, which reaches the maximum at 750 g/m³ with an explosion index of 310. 5MPa ⋅ m/s. The venting pressure and flame duration are mainly affected by the MgH2 dust concentration. The duct has a restrictive influence on the venting. With the duct length growing from 30cm to 100 cm, the maximum pressure and the explosion pressure rise rate in the vessel increase by 5%o and 9%o, respectively. NFPA 68 design standard is more applicable to MgH2 dust explosion at 250, 500 and 1 000 g/m³ . At 750 g/m³, the predicted value of the standard is lower than the experimental value. Only through the existing general industrial dust explosion venting standards for MgH2 explosion safety design may have certain risks.
- Subjects
DUST explosions; SAFETY standards; FLAME
- Publication
Chinese Journal of Explosives & Propellants, 2022, Vol 45, Issue 6, p898
- ISSN
1007-7812
- Publication type
Article
- DOI
10.14077/j.issn.1007-7812.202206017