after-air

English to Italian Law/Patents Mechanics / Mech Engineering boiler

The boiler furnace is provided at the lower part thereof with a pulverized coal burner and an after-air nozzle is provided downstream of the burner (upper part of the boiler). Pulverized coal fuel and combustion air are supplied from the burner and only air is supplied from the after-air nozzle.

to implement complete combustion by supplying air from an after-air nozzle positioned downstream of a burner as in, for example, the above-mentioned pulverized coal burning boiler,

an air supply nozzle such as an after-air nozzle is not brought into tight contact with a through hole communicating with the interior of the furnace and is provided with a gap.