Role of thermal decomposition products of NH4H2PO4 powder in gas explosion
LUO Zhen-min
ZHANG Jiang
REN Jun-ying
WANG Tao
KANG Kai
CHENG Fang-ming
WANG Ya-chao
Abstract：The thermal decomposition effect of amino poly phosphate powder is considered to be an important reason for its explosion suppression feature.To reveal the effect of amino poly phosphate(NH4H2PO4)powder on the inhibition of methane explosion,the author investigated the effect of thermal decomposition products ammonia and phosphorus pentoxide)of NH4H2PO4 powder on the methane explosive process.A test with the self-improved 20 L spherical gas explosion experimental system of XKWB-1 was conducted to test the influence that these two products would have on the process of methane explosive individually,and a comparative analysis of two products' influence level on the inhibiting process was carried out.The result shows that the thermal decomposition products (ammonia and phosphorus pentoxide) of NH4H2PO4 powder have a certain weakened effect on methane explosion,and the weakened effect of NH3 (one thermal decomposition product) is greater than the weakened effect of P2O5 (another thermal decomposition product),this appearance is even more significant for the high volume fraction of methane.
Keywords：NH4 H2 PO4 powderammoniaphosphorus pentoxidegas explosionexplosion pressure
Publication Date：2017-01-01
Pages：7( 1489-1495 )