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GAS EXTINGUISHING

Journal: Pozharovzryvobezopastnost/Fire and Explosion Safety (Vol.25, No. 5)

Publication Date:

Authors : ;

Page : 57-65

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Abstract

The article is devoted to the development of the system of automatic gas fire suppression systems based on extinguishing gases (inert compounds of deterrents, inhibitors of combustion processes and anew class of fire extinguishing gases forgethow). This paper analyzes the major elements of modern fixed gas fire-fighting systems: fire sensors are emerging, systems of transporting extinguishing agents to the fire, sensors sputtering, the gas properties of substances and their compositions. Summarized the way of changes in the efficiency of suppression of fires of various means of extinguishing gas. At the previous stage of development of fire extinguishing systems is most effective fire-extinguishing agents were the halocarbons - halogenated hydrocarbons, which were substances, inhibiting the combustion process, but having high toxicity on humans and negative impact on the environment that deplete the ozone layer of the atmosphere protects living beings from ultraviolet radiation from the sun. To avoid these impacts by international agreements all countries to reduce the production of freons, to reduce their release into the atmosphere and by 2030 to stop production. As a result of the search for alternative means of gas extinguishing specialists found substances not inferior in the efficiency of the suppression of the combustion of the carbons, but not with their negative properties. Representative of such compounds was Novec™ 1230 - ftorceten in the molecule where all the hydrogen atoms are replaced by fluorine atoms. Fire extinguishing concentration of this compound provide was even lower than the most efficient refrigerant and is equal to 4.2 %. This concentration is safe for humans. Further studies have shown the possibility of replacing refrigerant liquid with a low boiling point in existing installations Novec™ 1230 without processing of the systems themselves. The latter is especially important for industries with continuous manufacturing process and remote from the sources of supply, for example for drilling rigs on the shelf. Transportation of ftorceten possible without any restrictions by any means of transport, including aviation. In conclusion, the article suggested the following ways of development of systems of fixed gas fire-extinguishing installations: application of gas sensors addressable fire detection, battery replacement cylinders for modular installation (to avoid piping systems, the use of new designs of nozzles-spraying devices, the use of effective and safe extinguishing gas Novec™ 1230 ftorceten.

Last modified: 2018-10-18 17:38:18