Dry powder extinguishing agent:
Dry powder fire extinguishing agent is mixed by fire extinguishing base material (such as baking soda, ammonium carbonate, ammonium phosphate, etc.) and appropriate amount of lubricant (magnesium stearate, mica powder, talc powder, etc.) and a small amount of moisture-proof agent (silica gel). Made of fine particles, using carbon dioxide as the jet power.
Principle of action：
Dry powder fire extinguishing agents are usually stored in dry powder fire extinguishers or dry powder fire extinguishing equipment. During the fire extinguishing, the dry powder is ejected from the nozzle by the pressure of the pressurized gas carbon dioxide or nitrogen gas to form a misty powder stream sandwiching the pressurized gas, which is directed toward the combustion product. The principle of a series of physical and chemical reactions between dry powder and flame is as follows:
The sodium bicarbonate in the dry powder is decomposed by high temperature. The reaction is an endothermic reaction. The reaction emits a large amount of carbon dioxide and water. The water is heated to become water vapor and absorbs a large amount of heat, which acts to cool and dilute the combustible gas; the dry powder enters the flame. After that, due to the absorption and scattering of the dry powder, the heat radiation of the flame to the fuel is reduced, and the evaporation rate of the liquid is lowered.
Shijiazhuang Standard Chemicals Co.,LTD specializes in the production and export of firefighting powder, we will give you high quality products and excellent service. Welcome customers to negotiate.
Post time: Nov-15-2015