Boiler burner with preheater - has coil containing fuel around burner end in a heated coil exchanger

摘要

The burner has a support base (10) and a sleeve (11) at the end of the burner. This is connected to a vertical cylinder (12) mounted on the base behind the burner. The piping (13) connects the cylinder with a fuel reservoir. The base of the cylinder (12a) may be heated by an electric heater (15). The volume of primary air in the cylinder is measured through a calibrated orifice (17). The cylinder contains an exchanger (21) connected to the coil (22) by piping (21a). The flow to the exchanger is controlled by the valve (23).