B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
B01D 53/56 (2006.01) B01D 53/79 (2006.01) D21C 11/06 (2006.01)
Patent
CA 2271436
The present invention relates to a method of removing nitrogen oxides from flue gases of a pulp mill recovery boiler. In order to oxidize nitrogen oxides, peroxide solution is sprayed to the flue gases having a temperature of 300 - 800°C and flowing in the heat recovery section of the recovery boiler. The retention time of the flue gases in the contact zone of flue gases and peroxide solution is 0.5 - 5 seconds. The NO2 formed is recovered in a wet scrubber subsequent to the boiler.
Kiiskila Erkki
Kilpinen Pia
Saviharju Kari
Vakkilainen Esa
Ahlstrom Machinery Oy
Andritz Oy
Gowling Lafleur Henderson Llp
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