초록 ▼

A solid fuel gas generator generates extremely clean odorless nitrogen gas by a combustion process that involves the burning in an annular combustion chamber having gas discharge orifices of a gas generant composition having combustion product residues including alkali metal oxides and hydroxides an

A solid fuel gas generator generates extremely clean odorless nitrogen gas by a combustion process that involves the burning in an annular combustion chamber having gas discharge orifices of a gas generant composition having combustion product residues including alkali metal oxides and hydroxides and which may also include iron particulates, and features the provision between the composition and the gas discharge orifices of an annular primary cooling and filtering pack in the combustion chamber for maximum retention therein of such combustion product residues, the cooling and filtering pack including a fine mesh screen surrounding the gas generant composition and one or more layers of fiberglass woven fabric around the screen, the fabric being selected for its characteristic property at the combustion chamber temperature of reacting with the caustic soda in the combustion products to form innocuous sodium silicate and of becoming tacky to enhance particle entrapment, and further features in surrounding relation to the combustion chamber an annular secondary cooling and filtering pack including an aluminum silicate blanket that reacts with caustic soda residue to form innocuous sodium silicate.

대표청구항 ▼

A method of generating clean nitrogen gas in which most of the combustion residue product has been removed comprising a. providing a combustible composition essentially 60-80% sodium azide, 2-26% ferric oxide, 2-26% molybdenum disulfide and 0-6% sulfur, b. placing said combustible composition in a c

A method of generating clean nitrogen gas in which most of the combustion residue product has been removed comprising a. providing a combustible composition essentially 60-80% sodium azide, 2-26% ferric oxide, 2-26% molybdenum disulfide and 0-6% sulfur, b. placing said combustible composition in a combustion chamber having gas discharge orifices, c. raising the temperature of said combustible composition sufficiently to ignite it, and d. providing filtering means and cooling means between said combustible composition and said gas discharge orifices, said filtering means being selected for its compatibility with the combustion process and for its characteristic property at the combustion temperature of said composition of becoming less porous for a short interval during an early stage of the combustion function time thereby, during such interval, to increase the restrictive effect thereof and to retard the flow of combustion products out of said gas discharge orifices to allow such combustion products to be cooled by and condensed on said cooling means.