RU2036674C1 - Method for producing fire-extinguishing jet - Google Patents

Abstract

FIELD: fire-fighting equipment. SUBSTANCE: finely-dispersed steam-water aerosol is generated by using high-metallized hydroreacting condensed system when exothermic chemical reactions in thermochemical steam-aerosol generator form moist gas and finely-dispersed fire-extinguishing aerosol. The structure of fire-fighting jet is formed to suit the required parameters. EFFECT: higher efficiency. 2 cl, 1 dwg

Description

 The invention relates to fire fighting equipment for volume extinguishing of flammable substances, and also where it is necessary to obtain a given concentration of steam or a two-phase steam-water medium of any composition in a short period of time.

 A number of known methods for producing steam for volumetric extinguishing.

 Thus, there is a known method of producing a fire extinguishing composition by supplying water to a jet stream of a turbojet engine of a plant of VNPO Raspirator GIG-4 and GIG-1500.

 A known method of producing steam gas by extinguishing a gas and oil and gas fountains, where water is fed into the burning stream of the fountain, and then by thermobaric exposure to the liquid phase of the two-phase stream, it is evaporated to reduce the temperature of the stream and isolate it from oxygen.

 The closest way to obtain a fire extinguishing composition, an aerosol, selected as a prototype, is a method for producing steam gas, which consists in supplying water to a stream of high-temperature gas from the combustion products of a solid fuel source, followed by its evaporation in an evaporator.

 The disadvantage of this method is its relatively low productivity, as well as the need for large dimensions of the device for implementation.

 The purpose of the invention is to increase the specific productivity of the source of high-temperature gas while reducing the dimensions of the device implementing it, i.e. improving the energy characteristics of the formation of finely divided steam-water aerosol.

 This goal is achieved by the fact that water is supplied to a chamber where, for example, a hydroreacting highly metallized condensed system, for example, alkali metals, is placed in the form of a solid block. In this case, water is supplied in two streams. One with a flow rate ensuring the flow of exothermic reactions and the formation of high-temperature reaction products. Another provides a finely dispersed steam-water aerosol of specified parameters.

 In order to form a vapor-gas-liquid jet of various properties at the outlet of the device, a change is made in the ratio of the flow rates of the highly metallized hydroreacting system and water, as well as the dimensions of the nozzle outlet. This allows a wide range to change the ratio of steam and water aerosol, the degree of overheating of water, the range of the fire extinguishing jet.

 A comparative analysis of the proposed solution with the prototype shows that the proposed method differs from the prototype in that it combines hydroreacting fuel with an oxidizing agent in water, which simultaneously serves as the formation of high-temperature reaction products, their cooler, as well as an inert fire extinguishing substance.

 Thus, the claimed device for producing steam meets the criterion of "Novelty."

 From the patent and scientific and technical literature, technical solutions, in which, as a whole, they use a source of high-temperature combustion and a cooler of high-temperature gas, as well as a fire extinguishing agent to obtain a fire extinguishing jet of finely dispersed steam-water aerosol, have not been identified.

 Therefore, the inventive method for producing a fire extinguishing jet in the form of a finely dispersed steam-water aerosol meets the criterion of "Significant differences".

 In FIG. 1 shows a General view of a device that implements the proposed method.

 The device comprises a unit of a hydroreacting condensed system 1, a water supply manifold 2 with nozzles 3, a mass transfer chamber 4 and a nozzle 5.

 The device operates as follows.

 Water is supplied to the primary combustion products of block 1 from part of the nebulizers 3, as an oxidizing agent for carrying out an exothermic reaction and for obtaining high-temperature reaction products. From the other part of the nebulizers the rest of the water flow, to the formation of a fine aerosol of specified parameters.

 In the mass transfer chamber 4, the water droplets supplied from the nebulizers overheat to the boiling point at a given pressure in the generator and instantly boil at the outlet of the nozzle 5, forming a finely divided water aerosol.

 The proposed method provides a high unlimited by the principle of action specific productivity of the steam aerosol and the speed of its receipt.

 The proposed method allows you to create a fire system, both stationary and mobile, with different capacities (from kilograms to hundreds of kilograms of a mixture per second), and to provide vigorous filling of the volume of premises of complex configuration.

Claims (2)

 1. A METHOD FOR PRODUCING A FIRE EXTINGUISHING JET in the form of a finely dispersed steam-water aerosol, which consists in supplying water to a high-temperature gas stream, characterized in that, in order to increase the specific productivity of its formation, a high-temperature gas stream is formed by an exothermic interaction between a highly metallized water-reacting water system and part as an oxidizing agent, while the rest of the water is fed to the formation of a fine aerosol of specified parameters.  2. The method according to p. 1, characterized in that the aerosol parameters are changed by the ratios of the flow rates of a highly metallized hydroreacting system and water, as well as by the sizes of the outlet openings (nozzles) of the devices implementing it.