Process of treating the gases produced by the gasification of solid fine-grained fuels

US5147415A · kind A · utility

Assignee

• Metallgesellschaft AG · DE

Inventors

• Peter Herbert · Berlin, DE
• Horst Mielke · Neu-Isenburg, DE
• Gerhard Schmitt · Bensheim, DE

Key dates

• Filing date: Aug 29, 1990
• Grant date: Sep 15, 1992
• Expiry date: Aug 29, 2010

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10J2300/1884
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Fine-grained fuels are gasified in a fluidized state with a mixture of gasifying agents which comprise oxygen, water vapor and/or carbon dioxide. NH.sub.3 is substantially entirely removed from the product gas from the gasifier. All or part of the NH.sub.3 is combusted and any remaining NH.sub.3 is added to the exhaust gas from the combustor. In a preferred embodiment the content of nitrogen oxides and/or NH.sub.3 in the exhaust gas from the combustor and NH.sub.3 is supplied to the combustor at such a controlled rate that the contents of nitrogen oxides and NH.sub.3 in the exhaust gas to which NH.sub.3 has been admixed are minimized.