Process for eliminating nitrogenous ingredients from solid fuel
AssigneeMifuji Iron Works, Ltd.
InventorShozo Ito
Life of this patent
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Abstract
A nitrogenous ingredient is eliminated from solid fuel, for example, coal, by treating in a treating chamber, the coal with a treating gas having a predetermined temperature and composition at a temperature of 650.degree. to 1200.degree.C, the treating gas being prepared by uniformly mixing, in a conditioning chamber located upstream from the treating chamber, a predetermined amount of steam or water and hydrogen gas or a mixture gas containing at least 30% by volume of hydrogen gas together with an inert burnt gas containing at most 2% by volume of oxygen gas.
Claims10
A process for continuously eliminating a nitrogenous ingredient from solid fuels, comprising the steps of:
- 1. preparing a substantially inert burnt gas containing at most 2% by volume of free oxygen by completely a mixture of a fuel and air or oxygen gas in a combustion chamber;
- 2. feeding said burnt gas into a conditioning chamber directly connected to said combustion chamber at a predetermined feed rate,
- 3. simultaneously feeding steam or water and hydrogen gas or other gas containing therein at least 30% volume of free hydrogen gas into said conditioning chamber at predetermined feed rates;
- 4. uniformly mixing said burnt gas and said steam or water and said hydrogen gas or hydrogen gas-containing gas within said conditioning chamber to provide a treating gas for eliminating said nitrogenous ingredient, said treating gas having a predetermined temperature and composition;
- 5. feeding a solid fuel into a treating chamber;
- 6. feeding said treating gas into said treating chamber, and;
- 7. treating said solid fuel with said treating gas at a temperature of 650.degree. to 1200.degree. C.
Dependencies are inferred from the claim text.