Preforbrænding
Preforbrænding is a term used in Danish energy technology to describe a stage of combustion carried out before the main combustion event. The concept typically involves burning or preheating a portion of the fuel in a separate stage, often in a dedicated pre-burner, to create hot, partially oxidized gas that enters the main combustion zone. The aim is to improve overall efficiency, stabilize the flame, and reduce emissions such as nitrogen oxides (NOx) and carbon monoxide (CO).
Applications are found in industrial boilers, waste-to-energy plants, and gas-turbine combined-cycle systems, where two-stage or staged
Operation and design: A pre-burner or preheater heats and partially oxidizes the fuel under controlled conditions.
Benefits and challenges: Benefits include improved thermal efficiency, better fuel flexibility, and reduced emissions, together with
Relationships: Preforbrænding is related to staged combustion, premixed or diffusion concepts, and NOx-reduction strategies. The term