F - Mech Eng,Light,Heat,Weapons – 23 – J
Patent
F - Mech Eng,Light,Heat,Weapons
23
J
F23J 15/02 (2006.01) B01D 53/56 (2006.01) F23C 10/10 (2006.01) F23J 15/08 (2006.01)
Patent
CA 2080698
The amount of N2O emission from a fluidized bed reactor is reduced by adding a hydrogen radical providing additive (e.g. a hydrogen containing fuel such as natural gas or alcohol) to the flue gases discharged from the fluidized bed. Suffi- cient oxygen is present in the flue gases - either by addition with the additive, or by addition of an excess to the combustion chamber - so that the additive reacts with the oxygen, typically raising the temperature of the flue gases (e.g. from about 700-900°C to about 950-1100 °C) so that N2O production is reduced about 10-90%. The additive may be injected in or just prior to a cyclone for separating particles from the flue gases, or just prior to a superheater of a convection section, or in a combustion chamber just prior to a gas turbine.
Hiltunen Matti
Lee Yam Y.
Oakes Eric J.
Foster Wheeler Energia Oy
Gowling Lafleur Henderson Llp
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