Abstract: In a furnace (10) in which a sulfur-bearing fuel is burned, a sorbent material such as limestone is introduced into the upper portion of the furnace through a plurality of nozzle arrangements (40). Each nozzle arrangement comprises a pair of concentric pipes (42,44) with deflector means (46) located between the pipes and adjustable by means (54), so that the sorbent material introduced through the outer pipe is dispersed in an area near the furnace wall, while that introduced through the inner pipe is projected to the central portion of the furnace. There are sufficient nozzle arrangements, and they are so located, so as to cover substantially the entire cross-sectional area of the furnace with sorbent material.

Abstract: A combustor assembly having improved performance and improved pollution emission characteristics includes an annular combustion chamber and a premixing passageway having an outlet positioned adjacent either the inner or outer annular wall of the combustion chamber. The outlet is in gas communication with the combustion zone and has a perforated baffle thereacross. Air from the compressor enters the premixing passageway and atomizes fuel injected therein. The fuel-air mixture is directed from the premixing passageway through the perforated baffle radially across the combustion zone toward the opposite wall of the combustion chamber. The perforated baffle creates a localized stagnation region adjacent its surface which acts as a continuous ignition source for the combusting fuel-air mixture within the primary combustion zone. Additional air from the compressor is flowed to the combustion zone through openings in the inner and outer wall.