Process and apparatus for reclaiming sulfur-containing waste materials
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United States of America Patent
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Mar 8, 1983
Grant Date -
N/A
app pub date -
Nov 20, 1980
filing date -
Nov 24, 1979
priority date (Note) -
Expired
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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.
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