초록 ▼

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. Sufficient oxygen is present in the flue gases－either by addition w

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. Sufficient 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, in a gas discharge immediately after the cyclone (e.g. just downstream of a heat exchanger for cooling the flue gases and flattening the velocity profile of the flue gases), just prior to a superheater of a convection section, or in a combustion chamber just prior to a gas turbine.

대표청구항 ▼

A fluidized bed reactor system having minimized N2O in the flue gases ultimately discharged therefrom, comprising: a fluidized bed reactor including: a first combustion chamber; means for introducing fuel and an oxygen containing gas into the combustion chamber to provide a fluidized bed of particle

A fluidized bed reactor system having minimized N2O in the flue gases ultimately discharged therefrom, comprising: a fluidized bed reactor including: a first combustion chamber; means for introducing fuel and an oxygen containing gas into the combustion chamber to provide a fluidized bed of particles; and a flue gas discharge from the combustion chamber; a particle separator operatively connected to the flue gas discharge for separating a majority of the particles from the flue gas in the flue gas discharge; and means for injecting into the flue gas discharge a hydrogen radical providing additive for reaction with N2O to reduce N2O content in the flue gases.