The Role of Fuel Volatiles for the Emission of Nitrogen Oxides from Fluidized Bed Boilers - A Comparison Between Designs
Paper in proceedings, 1990

The nitrogen oxides formed during fluidized bed combustion of solid fuels originate from fuel nitrogen in both char and volatiles. In the course of combustion these fuel constituents not only contribute to the production but also take part in the reduction of the emission. In order to study the role of the nitrogen-containing volatiles for the production and re­duction of nitrogen oxides in fluidized bed boilers a series of tests has been carried out with fuels having different contents of volatiles in a range from anthracite to wood in two types of boiler, a circulating and a stationary fluidized bed boiler. It was found that the different designs of boilers result in different behaviours of the ni­trogen-containing volatiles. In stationary fluidized bed boilers the volatiles tend to reduce the emissions of NO comparable to what takes place in a pulverized coal flame, whereas in circulating fluidized bed boilers the volatiles do not have the same beneficial effect. In cir­culating fluidized bed boilers the emission of NO tends to increase with an increasing content of volatiles in the fuel, whereas the emission decreases from the stationarry fluidized bed type of boiler burning fuels with a larger amount of volatiles.

NOx

Fluidized Bed Boilers

FBC

Nitrogen Oxides

Author

Lars-Erik Åmand

Chalmers, Department of Energy Technology

Bo G Leckner

Chalmers, Department of Energy Technology

Proccedings of the Twenty-Third Symposium (International) on Combustion/The Combustion Institute

927-933

Driving Forces

Sustainable development

Subject Categories

Energy Engineering

Other Environmental Engineering

Areas of Advance

Energy

Infrastructure

Chalmers Power Central

More information

Created

10/7/2017