Combustion Process
Combustion process occurs when 4 conditions are met in combustible materials: Combustible material, atmospheric oxygen required for the combustion process, correct amount ratio of substance and oxygen and heat are required. If one of these conditions is missing, there will be no combustion.
From a chemical point of view, combustion is a rapidly spreading reaction between the combustible material and atmospheric oxygen, triggered by the heat of ignition. To extinguish a fire, the combustible material must be separated from atmospheric oxygen or cooled to below the ignition temperature. Fire extinguishing foam creates exactly this effect when used correctly. The extinguishing effects of the following substances applies as “5 Effects During Fire Suppression”:
1- Separation Effect
The closeed foam blanket separates the combustion zone from the surrounding air and prevents any new oxygen entering the fire material.
2- Cooling Effect
The water from the hose evaporates in the area in front of the flames, thereby removing the heat of the combustion zone and significantly reducing the reaction rate between the fire substance and the oxygen in the air. The fire agent is cooled with the applied water / foam ratio, that is, the foam concentrate.
3- Suppression Effect
By filling the rooms, ducts, plant sections and the like with light or medium foam, atmospheric oxygen and flammable gases required for combustion are suppressed. This type can be examined in th
e taxonomy of forest fire suppression effects. Aircrafts drop chemicals onto areas, after sufficient foam is produced by itself cover effect applies.
4- Cover Effect
In order to cut off the contact of flammable materials with the gas, the fire foam creates a closed cover and seals the gas with the substance hermetically, that is, flammable gases cannot enter the combustion area from the fire substance. Vapor pressure with simultaneous cooling of the fire substance
decreases, thereby preventing gas transitions and backfires. Thanks to its foaming as an antifoaming agent with light gas content in B fire class foam concentrates, it prevents harmful gas emissions to the environment. At the same time, the risk of fire is significantly reduced.
5- Insulation Effect
Thanks to the low conductivity of the foam, the fire substance that has not yet burned or has already been extinguished is insulated against the effects of heat and ignition.
The effects of fire suppression are widely used in open and closed areas in many types. All substances are applies as a rule
Fire Figting Foam Demo – Fatsa Chemistry