Comparative experimental study on inhibiting gas explosion using ABC dry powder and diatomite powder
Tóm tắt
Using a 20 L spherical explosion suppressing test system, the largest gas explosion pressure and maximum pressure rising rate with additives of ultra-fine ABC dry powder and diatomite powder were tested and compared, and the explosion suppression effect of the two kinds of powder was analyzed. Experimental results show that both powders can suppress gas explosion and ABC dry powder is superior to diatomite powder. Adding two powders under the same experimental conditions, when methane concentration is 7.0%, the maximum explosion pressure decreased 39% and 4%, respectively, while the rising rate of the maximum pressure decreased 80% and 53%, respectively. When methane concentration is 9.5%, the maximum explosion pressure decreased 14% and 12%, respectively, the rising rate of maximum pressure decreased 62% and 27%, respectively, the maximum explosion pressure decreased 23% and 18%, respectively, while the rising rate of the maximum pressure decreased 77% and 70%, respectively. When methane concentration is 12.0%, the explosion suppression effect of ultra-fine ABC dry powder is not affected by the methane concentration, and the explosion suppression effect of diatomite powder under high methane concentrations is more obvious.
Tài liệu tham khảo
Cai Z Q, Zhang Y H, 2001. The effect of the particle size of dry powder extinguishing agent on the performance of explosion suppression. Mining Safety & Environmental Protection, 28(4): 14–16.
Cheng F M, Deng J, Luo Z M, Cai Z Q, Zhang Y N, 2010. Experimental study on inhibiting gas explosion using diatomite powder. Journal of Mining & Safety Engineering, 27(4): 605–607.
Fan B C, Xie Bo, Zhang X H, 2001. Experimental research on explosion suppression by inert particles. Experiments and Measurements in Fluid Mechanics, 15(4): 20–25.
Guo X R, Li B Z, 2002. Research on application of ultrafine purified diatomite in carrier. Nonmetallic Mines, 25(2): 29–30.
Huang M H, 2006. Study on basic application of fire extinguishing agen-superfine ammonium phosphate dry chemical. Doctors Thesis, Tianjin University.
Laffitte P, Bouchet R, 1959. Suppression of explosion waves in gaseous mixtures by means of fine powder. In: the Seventh Symposium (international) on combustion. 504–508.
Mikhail K, 2006. Prevention and suppression of explosions in gas-air and dust-air mixtures using powder aerosol-inhibitor. Journal of Loss Prevention in the Process Industries, 19(6): 729–735.
Wen H, Cao W, Cheng F M, Wang K K, 2011. Experiment study on ultrafine ammonium phosphate dry powder to repress gas explosion. Mining Safety, 42(7): 1–3.
Xing X J, Fan B C, Yang H W, 2000. The experiment research on explosion suppression of fine powder in tube. Journal of Ballistics, 12(4): 72–75.
Yin Z P, 2004. Study on Basic Application of super fine powder fire extinguishing agent. Doctors Thesis, Nanjing University of Science.