Foam fire extinguishing agent, mainly acid salt (aluminum) and alkaline salt (sodium bicarbonate), a small amount of foaming agent (plant hydrolyzed protein or licorice powder), a small amount of stabilizer (ferric chloride), etc. The chemical foam fire extinguishing agent generated by the action generates a large amount of carbon dioxide gas after its action, and it generates many bubbles when it interacts with the foaming agent. This kind of foam is low in density and sticky, so it can cover the surface of the fire and isolate the air. At the same time, carbon dioxide is an inert gas and does not support combustion.
The principle of foam fire extinguishing The volume of foam can be many times larger than the volume of the original liquid, so as to cover the combustible material to isolate oxygen, reduce the temperature, and achieve the purpose of fire fighting. The principle of foam fire extinguisher is double hydrolysis, using non-toxic aluminum sulfate solution and dissolvable carbonate solution: Al2(SO4)3 + 6NaHCO3 = 2Al(OH)3 + Na2SO4 + 6CO2NaHCO3 saturated solution concentration is not high (NaHCO3 water solubility Not high); In addition, because there is water in the solution, it is not suitable for fire extinguishing by electric fire; in addition, CO2 and water will also react with active metals, and water will react with calcium carbide, so it is not suitable for fire extinguishing by active metals and calcium carbide.
In the event of a fire, fire-fighting products are a "life-saving talisman" for people to escape and save themselves. However, if they encounter counterfeit and inferior fire-fighting products, they will not only be unable to put out the fire in a timely and effective manner, and help escape, they may even encourage the fire, expand the scope of the fire, and cause disaster s consequence. Therefore, the quality of the chemicals in the fire extinguisher, such as foam fire extinguishing agent, dry powder fire extinguishing agent, etc., is very important. In addition, in recent years, the frequency of fires has become higher and higher. Although most accidents have been dealt with, the fire extinguishing tools we use in the fire extinguishing process will also release many gases or solids that have adverse effects on the environment. Particles. How to avoid environmental pollution?
You can choose fire-fighting agents to extinguish the fire, there is almost no water damage after the fire is extinguished, and there is no damage or pollution to the environment, protected objects, and personnel in the protected area; effectively absorb and reduce the concentration of solid suspended particles in the smoke in the fire area, increase visibility, and reduce smoke particles Damage to the human body; strong cooling effect, low ambient temperature around the fire.