ABSTRACT
ABSTRACT: Experiments with a new-designed Controlled Multiple Air Staging Technology (CMAST) in grate-firings show a considerable reduction of NOx-emissions. The applicability of the CMAST depends to a major extend on fuel parameters. Fuels with high moisture-contents cause a drop of the heat output in full load operation due to the reduced fuel-conversion. In consequence of reduced temperatures in the furnace the emissions of products of incomplete combustion rise in part load operation. To compensate these effects more primary-air is necessary, preventing the realisation of the multi-air-staging technique.
