Oxygen candle grain and preparation method thereof

Abstract

The invention provides an oxygen candle grain and a preparation method thereof. The oxygen candle grain comprises an inflammable drug layer formed by an inflammable drug, a grain inner core formed byan inner core drug as well as a grain outer ring formed by an outer ring drug, wherein the inflammable drug layer is located at the top end of the oxygen candle grain; the grain outer ring is of a cylindrical structure; the grain inner core is arranged in the cylindrical structure of the grain outer ring; both the grain inner core and the grain outer ring are located below the inflammable drug layer. The inner core drug contains a small quantity of metal powder fuel; the outer ring drug comprises sodium chlorate and a catalyst in a proper proportion as main components and contains no metal fuel. By means of the design, the outer ring drug is catalytically decomposed by heat transmitted by the inner core drug, so that heat emission of the oxygen candle is reduced greatly. The oxygen candlegrain is applicable to various specifications of solid oxygen generators and applies to the fields of marine vessels, aerospace, mines, self-rescue from various disasters and the like. By means of oxygen candle grain, the heat production quantity of the oxygen candle is small, oxygen evolution is stable, and the overall structure of the oxygen candle is stable.

Description

technical field [0001] The invention relates to a solid chemical oxygen source, in particular to a low heat-producing oxygen candle powder column and a preparation method thereof. Background technique [0002] Oxygen candle (solid chemical oxygen generator) is an emergency oxygen supply equipment developed based on the principle that oxygen-rich chlorate undergoes a thermal decomposition reaction to release oxygen. Its advantages are: small size, light weight, safe and reliable normal pressure, maintenance-free, simple operation, etc. Oxygen candles have been widely used as a life-saving emergency oxygen supply device in aerospace, ships, mines, and self-rescue in various disasters. [0003] Chinese invention patent specification CN 103362544 A uses a heat-insulating shell with a jacket structure to control and delay the heat dissipation of the oxygen candle. Add endothermic agent Al in the jacket 2 (SO 4 ) 3 18H 2 O or silica airgel, the inner wall of the jacket is co...

AI Technical Summary

Problems solved by technology

Microwave-induced heating oxygen production has the advantage of being able to control the oxygen production process, but microwave oxygen production needs to add a microwave device, which increases the complexity of the oxygen production system and cannot meet the requirements of the development of oxygen candle products in the direction of small and lightweight

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