Boiler operation with decreased NO.sub.x and waste water discharge
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United States of America Patent
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Apr 1, 1997
Issued Date -
N/A
app pub date -
Mar 11, 1996
filing date -
Apr 29, 1988
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Abstract
Pollution from industrial plants which produce NO.sub.x and waste water is reduced by utilizing waste water to prepare aqueous NO.sub.x -reducing solutions. Total water hardness in the waste water is preferably maintained below 2500 ppm, silicate below 200 ppm and the calcium to magnesium ratio above 2:1. The aqueous NO.sub.x -reducing solution will preferably contain hardness suppressing compostions in effective amounts.
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