Carbon dioxide extinguishing agent is a kind of fire extinguishing agent with more than one hundred years of history, the price is low, easy to obtain and prepare, it mainly depends on the act of suffocation and partial cooling effect to extinguish the fire. Carbon dioxide has a high density of about 1.5 times the amount of air.
At normal pressure, liquid carbon dioxide is immediately vaporized, and a typical 1kg liquid carbon dioxide can produce about 0.5 cubic meters of gas. Thus, when extinguishing a fire, carbon dioxide gas can exclude air and surround the surface of the burning object or distributed in a more confined space, reducing the concentration of oxygen around combustibles or in the protective space, resulting in suffocation and extinguishing the fire. In addition, when carbon dioxide is ejected from the storage container, it is quickly vaporized from the liquid into a gas, and some heat is absorbed from the surrounding area, which acts as cooling.
