SO.sub.2 Removal
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United States of America Patent
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-
Jan 20, 1981
Grant Date -
N/A
app pub date -
Jan 2, 1979
filing date -
Jan 2, 1979
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Improved methods are provided for the efficient and economic removal of sulfur dioxide from gases which comprise contacting the gas with neutralizing values obtained from Type S hydrated lime, i.e. calcined dolomite slaked with water under elevated temperature and pressure. The Type S hydrated dolomitic lime may be used in conjunction with a wet scrubber to provide base and neutralizing magnesium values, in a spray dryer or dry scrubber, or directly introduced into the boiler. The use of Type S hydrated dolomitic lime greatly enhances the efficiency of sulfur dioxide removal, providing for enhanced utilization of base values and more rapid rate of reaction.
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