METHOD TO EXTINGUISH LARGE-SCALE FIRES Russian patent published in 2015 - IPC A62C3/00 

FIELD: firefighting means.

SUBSTANCE: invention relates to extinguishing of large-scale fires. Experience of extinguishing such fires demonstrated practical inefficiency of existing methods for a series of reasons, the main of which is insufficiency and often unavailability of the main agent for fire extinguishing - water. The original source of the main fire extinguishing agent is atmospheric air, which contains water vapours. Absolute humidity of air, i.e. mass of water vapour per unit of air volume, depends on temperature and atmospheric pressure. According to statistics, in average on the soil surface on 1 m² there is 28.5 kg of water vapour available in air above this surface. Production of water from air, according to the proposed method, is carried out by cooling of air volume above fire zone to the temperature below the dew point temperature, i.e. when water vapour condenses and falls in the form of rain (or snow). Air above the fire zone is cooled by means of even distribution of liquefied nitrogen in its volume from reservoirs installed in aircrafts, in layers at different altitudes in the altitude range from several hundreds meters to the soil surface to approximately 1500 m. Simultaneously air is cooled in the surface layer from reservoirs with liquefied nitrogen, placed on the surface of soil along the perimeter of the fire front.

EFFECT: method to extinguish large-scale fires has a scientific basis, which makes it possible to produce the original source of this main fire extinguishing agent, not using technical means for delivery of water to seats of fire from natural or manmade water reservoirs, which may be located at significant distances from the fire zone.

3 cl, 1 dwg