For water-based fire extinguishers, the main components of the medicament, such as surfactants, are stirred with treated purified water. It exists in liquid form, so it is called water-based fire extinguisher for short.
After the water-based (water mist) fire extinguisher is sprayed, it forms a water mist, which instantly evaporates a large amount of heat from the fire scene, rapidly reduces the temperature of the fire scene, and inhibits heat radiation. The surfactant quickly forms a water film on the surface of the combustible material to isolate oxygen. It has dual functions of cooling and isolation, and participates in fire extinguishing at the same time, so as to achieve the purpose of rapid fire extinguishing.
1. Basic knowledge
The fire extinguisher mechanism of water-based fire extinguisher is the principle of physical fire extinguisher. Fire extinguishing agents are mainly composed of hydrocarbon surfactants, fluorocarbon surfactants, flame retardants and additives. The fire extinguishing agent has a penetrating effect on Class A fires, such as wood, cloth, etc. The fire extinguishing agent can penetrate into the interior of combustibles. Even if the fire is too large to be completely extinguished, the part where the agent is sprayed can effectively block the fire source and control the fire. spreading speed; it has the effect of isolating Class B fires, such as gasoline, and volatile chemical liquids, the agent can form a long-term water film on its surface, even if the water film is damaged by external factors, its unique fluidity can Heals quickly and suffocates fire. Therefore, water-based (water mist) fire extinguishers have flame retardancy that other fire extinguishers cannot match. Water-based fire extinguishers are not affected by indoor, outdoor, windy and other environments, and the fire extinguishing agent can act on the surface of the burning material to the maximum extent.
2. Fire extinguishing principle
It is a physical fire extinguishing mechanism. The agent can form and expand a thin water film on the surface of combustibles, so as to isolate the combustibles from the air and realize fire extinguishing. Through the atomizing nozzle, fine water mist is sprayed, spreading the fire and evaporating heat, quickly reducing the temperature of the fire, and at the same time reducing the concentration of oxygen in the air in the combustion zone to prevent re-ignition. Good re-ignition resistance is an incomparable advantage of other fire extinguishers compared with water-based fire extinguishers.
For more information, please visit: https://www.shanghaimetal.com/WaterBasedFireExtinguisher-414.html
Try also our WeChat by scanning the QR code below.
Fever L.//SMC Editor