Method for desulfurization of off-gases of a system for the manufacture of cement clinker
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United States of America Patent
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-
Oct 8, 2002
Grant Date -
Jun 13, 2002
app pub date -
Aug 15, 2001
filing date -
Aug 17, 2000
priority date (Note) -
Expired
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Abstract
A system for the manufacture of cement clinker from cement raw meal in which the off-gases of the cement clinker production line not only undergo denitrification but also undergo desulfurization, so that even sulfur-rich raw materials and fuels can be employed without exceeding the prevailing pollutant emission limits. A substream of the oversize material (30) discharged from the mixing chamber (29) of the precalcination stage (16) as solid sorbent may be combined with the off-gas (22) and/or with a partial gas discharge (38) of the rotary kiln off-gas in order to convert the sulfur oxides contained in those off-gases to calcium sulfate (34), which is subsequently separated from the system off-gas.
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