Dry powder fire extinguisher is equipped with dry powder extinguishing agent. Dry powder fire extinguishing agent is a kind of dry and easy-flowing fine powder used for fire extinguishing, which is composed of inorganic salts and a small amount of additives. It is dried, crushed and mixed into fine solid powder. Blow dry powder (mainly containing sodium bicarbonate) with compressed carbon dioxide to extinguish the fire.
Structure: Dry powder fire extinguisher is powered by carbon dioxide gas or nitrogen gas, and sprays dry powder in the bottle to extinguish the fire. Dry powder is a kind of dry, easy-flowing fine solid powder, which consists of fire extinguishing base material, moisture-proof agent, flow promoter, anti-caking agent and other additives.
Extended data
When putting out a fire, the water vapor generated by water vaporization will occupy the space of the combustion zone, dilute the oxygen content around the combustion products, prevent fresh air from entering the combustion zone, and greatly reduce the oxygen concentration in the combustion zone, thus achieving the purpose of suffocating and extinguishing the fire. When water is sprayed, the specific surface area of water droplets and fog droplets will be greatly increased, thus enhancing the heat exchange between water and fire, thus strengthening its cooling and suffocation effects.
In addition, it can dilute some flammable and combustible liquids that are easily soluble in water; The water mist produced by strong jet can emulsify flammable and combustible liquid, make the liquid surface cool rapidly, and reduce the speed of combustible steam generation, thus achieving the purpose of fire extinguishing.
According to the types of fire extinguishing agents, there are 12 1 1 simple fire extinguishers, also known as aerosol halon fire extinguishers; Simple dry powder fire extinguisher, also known as portable dry powder fire extinguisher; There is simple air foam extinguisher, also known as light air foam extinguisher.
Simple fire extinguishers are suitable for home use. Simple 12 1 1 fire extinguishers and simple dry powder fire extinguishers can put out the initial fires of liquefied petroleum gas furnaces, angle valves on steel cylinders, or gas stoves, as well as fires caused by the burning of solid combustible materials such as hot pot fires and waste paper baskets.
Simple air foam is suitable for initial fires caused by oil pans, kerosene stoves, oil lamps and candles, and can also put out fires caused by solid combustibles.
Simple fire extinguishers are more suitable for home, which is convenient to put out sudden fire.
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