SU566593A1 - Combustion inhibitor for acetylene-air mixtures - Google Patents

Description

one

The invention relates to flame retardants and may be psychosease in the field of extinguishing combustible gases, namely acetylene-air mixtures.

Known inhibitors are flammable, soy, and of inorganic salt with water-resistant and sprayed additives, their agents, such as potassium stearate and talc. Inhibitors are also known in which potassium or sodium bicarbonate is added as an inorganic salt. However, inhibitors on the basis of bicarbonates of sh. Alkaline metals do not reliably suppress and quench the flame of explosive mixtures of acetylene with air.

1J. The closest to the composition proposed is an inhibitor consisting of cobalt sulfide as an inorganic salt, potassium stearate and talc. This inhibitor does not provide a high efficacy in suppressing and extinguishing the flame. In order to completely suppress the ignition of the mixture of acetylene with air, a high rate of consumption of the inhibitor (4.3 g / l) is required and, consequently, the cost of fire extinguishing agent is high; its composition is 2.

The aim of the invention is to provide an inhibitor with increased suppression and quenching of the flame.

This is achieved by the fact that the inhibitor as an inorganic salt contains potassium ferrocyanide (90-95 wt.%), As well as potassium stearate (3-7 wt. 7 °) and talc (2-3 wt.%).

In the preparation of the inhibitor, the pre-dried components are mixed in the following ratio, g: Iron-synergistic

potassium190

Kali stearate 6

Talc4

After mixing, the powder is ground to a fraction with a particle size of 60-100 µm.

The resulting inhibitor is tested to suppress the combustion of a mixture of 9% acetylene with air at a facility that allows a photographic recording of the flame propagation process of explosive mixtures.

When a sodium bicarbonate based inhibitor is introduced into the fuel mixture in an amount of 0.1 g / 1, the flame propagation rate is halved. Increasing the amount of inhibitor injected does not lead to a noticeable decrease in the rate of flame propagation.

In the case of inhibition of a combustible acetylene-air mixture of a powder based on cobalt sulfide, complete suppression of the flame is achieved with the introduction of 4.3 g / l of powder,

34

When adding the proposed inhibitor synergistum potassium with the following correlative inhibition of the process of distribution of components, weight. %:

Flame occurs by the addition of inhibi-ferrosynergide

torus in the amount of 0.1 g / l.kali 90-95

 ,, 5 Kali stearate 3-7

Claims (2)

Talc23 invention formula Acetylene-air ignition inhibitor - Sources of information, taken in vinnyh mixtures, consisting of inorganic compounds in the examination li, potassium stearate and talc, distinguishing -1. Review of patent materials "Means so that, in order to increase effectively-10 extinguishing fires, VNIIPO, M., 1970, p. 17 suppressing and extinguishing the flames in 2. USSR author's certificate No. 485742, ve of inorganic salt, it contains iron-cl. A 62D 1/00, 1973.  1566593