RECUPERATOR Russian patent published in 2016 - IPC F23L15/04 

FIELD: energy.

SUBSTANCE: invention relates to using secondary energy resources and can be used in ship boilers for heating air, in furnaces of machine-building factories. Recuperator comprises an annular channel for passage of heated air, framed a gas duct, equipped with a cylindrical secondary emitter coaxially arranged to make an annular clearance and consisting of two cylinders, the walls of which are perforated. Annular channel is equipped with an air feed pipe branches. Inner and outer cylinders can rotate around the axis relative to each other.

EFFECT: technical result is intensification of heat exchange due to changing a perforating level of the secondary emitter by moving the outer and inner cylinders relative to each other.

1 cl, 1 dwg