Method of treating an acid gas stream and an apparatus therefor
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United States of America Patent
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Apr 30, 2013
Grant Date -
Mar 15, 2012
app pub date -
Apr 6, 2010
filing date -
Apr 8, 2009
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Abstract
Disclosed is a method of treating an acid gas stream through a series of process steps to provide an ammonium sulfphate stream. The method involves passing the acid gas stream to an incinerator to oxidize the H2S to SO2 to yield an incinerator flue gas stream. The incinerator flue gas stream is passed to a sulphuric acid unit that produces H2SO4 from the SO2 of the incinerator flue gas stream and to yield an aqueous sulphuric acid stream and a sulphuric acid unit off-gas stream. At least part of the aqueous sulphuric acid stream is passed to an ammonia scrubber wherefrom an aqueous ammonium suphate stream is yielded.
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