Method of reducing NO.sub.x emissions in rotary preheater mineral kilns
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United States of America Patent
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May 27, 2008
Grant Date -
Feb 7, 2008
app pub date -
Aug 3, 2006
filing date -
Aug 3, 2006
priority date (Note) -
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Abstract
This invention relates to a method to further enhance NO.sub.x reduction in rotary preheater mineral kilns by coupling the temperature control and gas composition uniformity afforded by the high temperature mixing with the use of chemical reducing agents. The chemical reducing agent or agents, generally chosen from ammonia or ammonia precursors, are introduced at a specific point in the rotary preheater kiln which has as an optimal temperature window to achieve the greatest reduction of NO.sub.x emissions.
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