Experimental Research on Effect of Different Inert Powders on the Minimum Ignition Energy and Suppression Effect of Sucrose Dust

In order to prevent sucrose dust explosion, the suppression effect of four inert dusts (such as NH4H2PO4, Al (OH)3, NaCl and NaHCO3) on minimum ignition energy (MIE) was studied by 1.2L Hartmann apparatus. The experimental results shown that fire sensitivity can be reduced adding powders, MIE significantly could increased. higher mass fraction powders smaller particle size, better effect. best flame propagation NaHCO3. NaHCO3, Al(OH)3, (38-47μm) reaching 20%, 60%, 35% 40% respectively, were completely inerted. which size 25-37μm reached 30% Therefore, cloud combustion was: NaHCO3 > NH4H2PO4> (OH)3.