Study On The Fire Extinguishing Efficiency Of A New Binary Fire-extinguishing Agent

Ever since Halon 1301 was targeted as a serious ozone-depleting substance, developing and manufacturing non-ozone-depleting replacement agent has attracted the international research interests. As Halon alternatives, inert gases and halocarbon fire extinguishing agent are now commonly used because of their cleanliness, effectiveness and non-conductive characters. However, commercialized halocarbon exist some defects, for example, most environment-friendly halocarbon fire extinguishing agents that developed in the past years do not contain bromine in molecular structure and therefore are not as effective in flame extinguishment tests or actual large scale fire suppression tests as Halon 1301 besides it owns some green house effect. Inert gases are total flooding agents. When they are discharged into a compartment to extinguish fire, they displace oxygen in the compartment and lower the oxygen concentration around the fire, eventually to a level below the fire-extinguishing concentration. So it needs for storing a large volume of nitrogen in cylinders to suppress the fire successfully.Cleaning fire extinguishing agent (BTP), composed with molecular structures containing both a carbon-carbon double bond and a bromine atom, is a kind of tropodegradable bromocarbons. The justification for its further consideration as Halon replacement is the expectation that it will have short atmospheric lifetimes due to the propensity of alkenes to undergo addition reactions with OH radical at the site of the double bond. At the same time, the presence of Br atom suggests that these compounds will also have a high degree of fire suppression efficiency. So the bromocarbon containing carbon-carbon double bond is tropodegradable and keeps high fire suppression efficiency. Some researchers have proved that the ozone destroying potency and the globe potency of BTP is zero.In order to develop a new kind of gas fire-extinguishing technology, a method for synthesizing the BTP by and C₃F₃H₃ was progressed in our research group on the base of the reaction mechanism analysis and synthesizing route feasibility analysis. Besides that, by the bench-scale experimental study, the synthesizing conditions were ascertained and optimized.The toxicity of BTP was studied by the method of toxicology. The lowest observed adverse effect level (LOAEL) and no observed adverse effect level (NOAEL) was tested by using mouse. Assessing the toxicity rank of BTP based on the median lethal dose (LD₅₀) of BTP. In order to find the toxic reasons, the pathology slice ups of...