SHAFTLESS AIR HEATER Russian patent published in 2021 - IPC C21B9/00 F24H3/00 

FIELD: heating.

SUBSTANCE: invention relates to equipment for heating the air of blast furnaces. The shaftless air heater is comprised of a burner apparatus with a gas collector, an antechamber, the cavity whereof constitutes a chamber for mixing gas and air flows, a combustion chamber and a checker chamber. The antechamber, the combustion chamber and the checker chamber are communicated and placed coaxially. The gas collector is present in the form of an annular channel made in the lining of the antechamber forming one internal and one external annular walls. The mixing chamber communicates with an air collector made annular, the gas and air outlets into the mixing chamber are made on the inner annular wall, said outlets by means of the gas and air collectors communicate with the corresponding gas and air supply branch pipes from the outside. The air collector is located in the lower part of the antechamber under the gas collector and constitutes an annular chamber formed by a cavity between a metal annular beam and a supporting plate installed at the base of the antechamber, connected with each other and with the casings of the antechamber and the combustion chamber. The metal annular beam forms the support of the antechamber, and the supporting plate is provided with holes for exit of the air from the air collector, communicated with the air outlets to the mixing chamber located below the gas outlets to the mixing chamber via air supply channels.

EFFECT: provides an increase in the resistance and durability of the shaftless air heater.

6 cl, 3 dwg