AIR HEATER Russian patent published in 2017 - IPC F23L15/00 

FIELD: energy.

SUBSTANCE: invention relates to power engineering and can be used in devices for air heating, supplied for heating rooms. Essence of invention in that the air heater which comprises cylindrical housing and cylindrical afterburning chamber, convective heating surface, made of tubes arranged uniformly around the afterburning chamber parallel with its axis, spiral channel in annular space of convective heating surface, enveloping afterburning chamber outside from the air feed branch pipe to its discharge branch pipe, as the burner is installed cyclone furnace, between cyclone furnace and afterburning chamber there is connecting gas duct, axis of the cylindrical body is directed vertically, between the cylindrical casing and afterburning chamber is installed concentrically to them the intermediate pipe, which divides the convective heating surface into two – first, installed between the walls of intermediate pipe and afterburning chamber, and the second, located between walls of intermediate pipe and cylindrical housing. In the upper part of the intermediate pipe between the last turns of the intermediate tube plate, generatrix of the spiral channel, there is formed an opening, connecting the air space of the second convection heating surface and first, in the lower part of the intermediate pipe is formed an opening connecting in alignment with the outlet air space of the first convective heating surface with an air space of the second, spiral channel in annulus of second convection heating surface is made rising from the inlet branch to the upper opening in intermediate pipe, spiral channel in annular space of the first convective heating surface is made descending from the upper opening in the intermediate tube to bottom, a connecting gas duct is equipped with two or more pipes with seats for attachment of cyclone burners.

EFFECT: in so doing it increases the efficiency of the air heater due to involvement in heat exchange between combustion products of fuel and heated air radiation component and wider range of air temperature control.

1 cl, 5 dwg