Why can fire extinguishers extinguish fire?
A fire extinguisher is a portable fire extinguisher. Put chemicals in the fire extinguisher to save the fire. Fire extinguishers are one of the common fire protection facilities. They are stored in public places or where fires may occur. Different types of fire extinguishers are filled with different components. They are designed for different fire alarms. Care must be taken to avoid adverse effects and dangerous conditions.Principle and operation method of foam extinguisherAl2 (SO4) 3+6NaHCO3==3Na2SO4+2Al (OH): +6CO2 = 3
According to the carbon dioxide does not burn, nor support the combustion of nature, people developed a variety of carbon dioxide extinguishers, a foam fire extinguisher, fire extinguisher and liquid CO2 extinguishers. The principle and method of using the following brief foam.
In addition to the two kinds of reactants, the fire extinguisher also added some foaming agent. Turn on the switch, the bubble emitted from the fire extinguishers, covering the burning objects, the burning material and the air separation, and lowering the temperature, achieve the purpose of fire fighting. As the foam extinguisher foam spray contains a lot of water, it as the liquid carbon dioxide fire extinguishers, fire after pollutants, leaving no trace.
Foam extinguisher has two containers respectively containing two kinds of liquid, which is aluminum sulfate and sodium bicarbonate solution, two solutions do not contact each other, without any chemical reaction. (usually do not touch the foam extinguisher) when foam fire extinguisher, fire extinguisher inverted, two solutions are mixed together that will produce large amounts of carbon dioxide:Al2 (SO4) 3+6NaHCO3==3Na2SO4+2Al (OH): +6CO2 = 3
