干粉灭火器

NaOH + AlCl3 + 3NaHCO3 = = = = Al (OH) 3 + 3CO2 ↑ + 3NaCl press Powder fire extinguisher in filling is dry powder extinguisher. Dry powder extinguisher is for firefighting dry and easy flow of superfine powder, by a fire extinguishing efficiency of salts and a small amount of additive by drying, crushing, fine solid powder mixture composition. It is a kind of fire extinguisher is widely used and mainly used in fire extinguishers. Except special powder metal fire fighting chemical suppressants outside, dry powder extinguisher typically divided into BC dry powder extinguisher and ABC powder two kinds big. Such as sodium bicarbonate sodium salt powder dry, modification, sylvite powder, ammonium dihydrogen phosphate powder, ammonium phosphate powder, phosphoric acid hydrogen two dry and amino powder extinguisher, etc. Dry powder extinguisher mainly through the pressurized gas under the action of ejective mist and flame contacts, powder mixed occurs when the physics, chemistry fire-extinguishing: one is the inorganic * powder of volatile decomposition products, and combustion process fuel produced by free radicals or active groups produce chemical inhibition and vice catalytic effect, make the burning chain reaction interrupt and extinguishing, 2 it is * dry powder fell on combustible surface outside, produces chemical reaction, and in high temperature under the action of form a layer of glass shape layer, thus isolation oxygen, and extinguish fire. Choking In addition, still partial dilution oxygen and cooling effec