Boiler operation with decreased no and waste water discharge

Details Boiler operation with decreased no and waste water discharge Boiler operation with decreased no and waste water discharge

B - Operations, Transporting

01

D

B01D 53/56 (2006.01) C02F 1/70 (2006.01) C02F 5/14 (2006.01) C02F 9/00 (2006.01)

Patent

CA 2140885

Pollution from industrial plants which produce NOx and waste water is reduced by utilizing waste water to prepare aqueous NOx-reducing solutions (50). Total water hardness in the waste water is preferably maintained below 2500 ppm, sil- icate below 200 ppm and the calcium to magnesium ratio above 2:1. The aqueous NOx-reducing solution will preferably contain hardness suppressing compositions in effective amounts.

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