METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN AIR

**Definition:** This place covers:

General function-oriented aspects of methods and apparatus for combustion of

**Limiting references (this place does not cover):** - Burners -> F23D

**Glossary:** - Air: a mixture of gases containing free oxygen and able to promote or support combustion - Primary air: air supplied to the burning fuel, e.g. together with the fuel in order to liberate combustible gases - Secondary air: air supplied to the combustible gases liberated by the primary air in order to complete their combustion. The expression "secondary air" covers "tertiary air" etc. - Burner: a device by which fluid fuel or solid fuel suspended in air is passed to a combustion space where it burns to produce a self-supporting flame. A burner includes means for feeding air that are arranged in immediate connection with a fuel feeding conduit, for example concentric with it. - Combustion: a heat-producing sequence of chemical reactions between a burnable substance and molecular oxygen, e.g. in air in most cases generating light in the form of flames or a glow - Combustion chamber: a chamber in which fuel is burned to establish a self-supporting fire or flame and which surrounds that fire or flame - Combustion zone: the part of an apparatus where the reaction takes place between air and fuel