an oxygen candle

Abstract

An oxygen-generating candle, comprising an absorption flammable layer, a heat generating layer and a main candle body layer; the heat generating layer is provided between the absorption flammable layer and the main body layer; according to mass percentage, the main body layer is made of 90% to 96% chlorate, 1.5% to 5% catalyst, 0 to 3% fuel, 1.5% to 2.5% binder and 0.5% to 1.5% stabilizer; the heat generating layer is made of 70% to 80% chlorate, 5% to 15% catalyst, 5% to 12% fuel and 3.0% to 6.0% binder; the absorption flammable layer is made of 5% to 15% fuel, 80% to 90% strontium chromate, 3% to 5% binder and 0 to 1% chlorate; the catalyst is a combination of two or more from among cobalt oxide, manganese dioxide and titanium oxide; the amount of catalyst in the main candle body layer is 4-5 times greater than the amount of the catalyst of the heating layer; the fuel comprises one or more from among magnesium powder, titanium powder, cobalt powder, and zirconium powder. Due to the adjustment of the type and proportion of the catalyst, the decomposition temperature of the oxidizing agent chlorate is lowered and the demand for an active metal of the flammable layer is lowered; in addition, the addition of a flame retardant may control the rate of energy release of the active metal.

Description

technical field [0001] The invention relates to a solid chemical oxygen source formula, in particular to a high-efficiency oxygen release candle. [0002] technical background [0003] The solid chemical oxygen device is an emergency rescue device developed by the principle of generating oxygen through thermal decomposition of oxychlorate or perchlorate under the action of a catalyst. Its characteristics are: long storage time and small volume; high oxygen density, which is three times that of compressed oxygen of the same volume; oxygen candles are stored and used under normal pressure, and there is no danger of high pressure; the solid chemical oxygen device is maintenance-free, which greatly reduces maintenance costs . As a life-saving emergency oxygen source, solid chemical oxygen devices have been widely used in refuge places, mines, aerospace, submarines, medical and civil applications. [0004] At present, expensive lithium peroxide reagents are usually added to the ...

AI Technical Summary

Problems solved by technology

[0004] At present, expensive lithium peroxide reagents are usually added to the formula of solid chemical oxygen candles at home and abroad, which makes the formula easy to absorb moisture and slow down the combustion, which in turn affects the oxygen production speed of the oxygen candle, and the decomposition temperature is above 200 degrees.

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