Citation

Qin X, Li X. China Saf. Sci. J. 2020; 30(4): 41-46.

Copyright

(Copyright © 2020, China Occupational Safety and Health Association, Publisher Gai Xue bao)

DOI

10.16265/j.cnki.issn1003-3033.2020.04.007

PMID

unavailable

Abstract

In order to study suppression effects of NH4H2PO4 on sucrose dust explosion, the maximum explosion pressure pmax and maximum rate of pressure rise (dp/ dtmax) of NH4H2PO4-sucrose mixed dust were analyzed through experiment with a 20 L spherical explosion device. The results show that NH4H2PO4can reduce pmax and (dp/ dt)max of sucrose dust and delay the time they take to reach peaks, thus weakening intensity of sucrose dust explosion. For sucrose dust whose mass concentration are 200, 350, 500 and 750 g/ m3, they would be completely inert when mass fraction of NH4H2PO4 is 8%, 14%, 14% and 13% respectively. That of NH4H2PO4 at different particle sizes (48-74, 38-47, 25-37 μm) which makes 350 g/ m3 sucrose dust completely inert is 14%, 13% and 11% respectively. Adding NH4H2PO4 can effectively reduce damage of sucrose dust explosion, and within a certain range of particle size, the smaller it is, the better suppression effect there will be. © 2019 China Safety Science Journal

Language: zh