SU971354A1 - Method of fire-fighting in hermetically sealed compartment - Google Patents

Description

one

The invention relates to the field of fire fighting equipment and is intended to extinguish fires in sealed OTceiiax mobile transport facilities and. stationary coastal facilities.

There is a method of fire extinguishing in an airtight compartment by feeding nitrogen into it.

The disadvantage of this method is that the supply of a large amount of nitrogen to the compartment leads to a significant decrease in the relative concentration of oxygen and a large consumption of nitrogen.

The aim of the invention is to improve the toxicological situation. pgtstsayemy compartment after a fire.

The goal is achieved by the fact that in the fire extinguishing method in the hermetic compartment By supplying nitrogen according to the invention with it, sprayed water is supplied to the stream of nitrogen, and 20,200 l / min of nitrogen and 0.3-0.6 l / min of water

The method of combining hot air in an airtight compartment is as follows.

Finely sprayed water is fed to a stream of nitrogen. With such a feed, a uniformly distributed nitrogen-water fine aerosol is formed in the compartment, which reduces the heat capacity of the medium to 170-210 KJ per mole of oxygen, at which combustion ceases.

Example 1. In a 7 m compartment, a diesel fuel pan, the burning area of which is 0.125 m, is heated.

The compartment is sealed and includes an electric coil for firing diesel fuel. The time of pre-mountain & before nitrogen and sprayed water is 30 seconds. Nitrogen is supplied under pressure & 1, Q MPa through openings with a diameter of 2 mm each, and water is supplied from sprays with a diameter of 1.2 mm under a pressure of 3.0 MPa.

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The test results of the fire-application of the method of fire extinguishing of the path in the hermetic compartment are given in the joint supply of nitrogen and

table. sprayed water reduces udep Example 2. When extinguishing a fire in room-5, extinguishing fires with pure nitrogen in a 1000 m slug using the 1 j method is 80% less, which significantly distributes nitrogen to the protected compartment of the system up to 64.3% of protected o & for fire extinguishing. During the prod and after that, which is necessary to have 2O7 fire cylinders, the concentration of pest direct AO liters, while for extinguishing a fire of 10 months, is reduced by 30–40%, and the pressure compartment of the hermetic compartment allows for disruptive gas nitrogen and water mist of the necessary composition for some time 20 cylinders with nitrogen .. in the emergency room.

the weight of nitrogen flow compared with

Claims (1)

1. US Patent No. 3893514, cl. 169-46, published, 1975 (photo).