DEVELOPMENT OF INDIVIDUAL ASPECTS OF CONTAINER METHOD OF FIRE EXTINGUISHING

Abstract

Currently, the creation of fundamentally new technical means of fire extinguishing and the development of new methods for delivering fire extinguishing substances to a remote distance when extinguishing complex fires is the actual scientific and technical problem. The fire fighting equipment currently used in the territorial divisions of the SES of Ukraine does not allow delivering of fire extinguishing substances at a distance of 100 m and more. Existing fire fighting equipment is designed to deliver water, aqueous solutions and foams at a distance of up to 100 meters, as well as dry chemicals at a distance of up to 70 meters. Today various researchers are developing technical means and methods for remote delivery of such fire extinguishing agents as aerosol-forming compounds, dry chemical powders, fire extinguishing freons, solid carbon dioxide and organometallic compounds. At the same time, the use of the considered fire extinguishing agents did not become widespread in the fire and rescue units due to insufficient development of technical means and methods of delivery. To solve the problem of delivering fire extinguishing substances to a remote distance while extinguishing complex fires, it was proposed to use a barrelled fire extinguishing system, which ensures high-precision delivery by throwing the containers filled with extinguishing agent directly into the combustion zone along the ballistic trajectory. The analysis of various fire extinguishing substances and compositions for use in containers showed that to achieve the highest efficiency of fire extinguishing, it is advisable to use dry chemical powders. As a result of the study of the use of dry chemical powders as container fillers, the mechanics of the fire extinguishing action of dry chemical compositions after releasing from the container by excessive pressure, created by detonation products of explosives, was investigated. A method for determining the total mass of dry chemical powder and the required number of containers filled with dry chemical powder for extinguishing class A and B fires has been developed. Keywords