COMBUSTOR WITH RISER

摘要

A substantially vertical riser (9) extending from the uppermost portion of the combustor (3) in the combustor (3) of a PFBC power plant as an extension of the freeboard (3b) brings about a favourable outflow and mixing of the combustion gases and combustion of accompanying unburnt fuel by longer residence times for fuel particles in the combustion gases before these are led to the components (7a-7f) of a cleaning plant. The riser (9) may also comprise means for injection of NOx-reducing additives or for the supply of secondary air.