Process and apparatus for reclaiming sulfur-containing waste materials

US4376108A · kind A · utility

Assignee

• Grillo-Werke AG · DE

Inventors

• Norbert Lowiciki · Duisburg, DE
• Joachim Wolf · Munich, DE
• Wolfgang Schwarz · Ludwigshafen, DE

Key dates

• Filing date: Nov 20, 1980
• Grant date: Mar 8, 1983
• Expiry date: Nov 20, 2000

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/129
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Disclosed are a process and apparatus useful for reclaiming sulfur-containing waste materials such as waste or spent sulfuric acid and acid tars. The sulfur-containing waste material is burned in a multi-stage combustion furnace having, in sequence, a rotary furnace containing heated coke, an intermediate combustion chamber and a secondary combustion chamber. The temperatures, gas flow rates and amount of added air are carefully controlled. A separation gas is produced having a high sulfur dioxide content which can be used in the sulfuric acid contact process. The separation gas is free of nitrous oxides, hydrocarbons and sulfur trioxide.