SU1528511A1 - Method of generating foam in putting out a fire - Google Patents

Abstract

The invention can be used in fire fighting and makes it possible to increase the effectiveness of extinguishing a fire by increasing the fire extinguishing capacity of the foam and its stability. An aqueous solution of alkali is added to the aqueous solution of surfactant, then the aqueous solution is pressurized with carbon dioxide under excess pressure and fed in a compact stream to the seat of fire. 1 ill., 1 tab.

Description

The invention relates to methods for producing foam in case of fire lyiueHMH and can be used. and called in the fire business.

Ib. ii) of the invention — enhancing the effectiveness of fire reading I by increasing () the ability of the foam and its

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The drawing shows a device for ocyiuecTB / ieHHH of the proposed method.

(l1 () c (i) is carried out as follows.

The NOL wave by pressure from the source 1 of the pi to them via the pipeline 2 enters the ejector 3, creating a vacuum in its chamber. 11on (. R.nostno-active substance (surfactant) and nitech, located in hydraulic tanks 4 and 5, respectively, but pipelines 6 and through metering devices 8 and 9 but pipelines Yu and collector I enter the chamber of the ejector 3, and then but pipeline 12 goes to mixer 3. Carbon dioxide, which is iodine, from cylinders 14 through the number 15 and gas pressure regulator 16, reducing them and ii iiR- to the working, enters the mix. 13. In the mixer 13, carbon dioxide is dissolved in an aqueous solution of the surfactant and imichi, and then this solution

A pipeline 18, equipped with a safety valve, a valve 19, flows through a flexible hose 20 into the fire bore 21 and further to the fire center.

The extinguishing capacity of aqueous solutions is determined using a laboratory setup. At the same time, the fire extinguishing efficiency is characterized by the time of burning of hot gasoline spilled on a round area of 0.03 m in an amount of 100 ml, the ignition time of which is 30 s. A foaming aqueous solution containing 1 wt.% Na-alkyl sulfates of primary alcohols of the Ciu-Ci.j fraction (ASPS) or I wt.% Of fluorinated surfactant "fluorine and I wt.% NaOH or KOH are fed under a pressure of carbon dioxide of 0.5 MPa. The flow rate of aqueous solutions is 10 ml / s, the flow rate of the solution is 0.333 l / m-s.

The test results of fires according to the proposed method are given in the table.

From the data in the table it follows that the fire-extinguishing efficiency of an aqueous solution of ATP and alkali with carbon dioxide is 2.6 times higher than that of the same solution, but without alkali, and the fire extinguishing is effective

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The content of an aqueous solution, fluorinated surfactant "fluorine, and alkali with carbon dioxide is 2 times higher than that of the same solution, but without alkali.

The stability of the foam in comparison with the prototype increases by 3-4 times.

Claims (1)

Invention Formula The method of producing foam when extinguishing a fire, including dissolving over active substance in water, saturating the solution with carbon dioxide under pressure and supplying an aqueous solution to a fire center, characterized in that, in order to increase the effectiveness of fire extinguishing by increasing the fire extinguishing capacity of the foam and its stability, before saturating the solution with carbon dioxide in it In addition, an alkaline aqueous solution is introduced and the aqueous solution is supplied to the fire site with a compact stream. Example Extinguishing Solution Stew time, with