GAS HEATING METHOD Russian patent published in 2019 - IPC F23D14/66 

FIELD: heat exchange.

SUBSTANCE: invention relates to heat engineering. Method of gas heating is based on use of device for heating of gas with recuperation of heat of flue gases. Device comprises annular combustion chamber, the cavity of which is formed by end wall with fuel supply pipe, end wall with flue gas discharge branch pipe, external cylindrical wall and inner cylindrical wall, between which the first cylindrical perforated partition is located, forming with the inner cylindrical wall the initial flue gas formation zone, the air supply pipe from the atmosphere and the gas heating chamber, which cavity is formed by said inner cylindrical wall, cold gas feed branch pipe and heated gas discharge branch pipe. Device is equipped with fan, outlet of which is connected by gas duct to cavity between said outer cylindrical wall and first cylindrical perforated partition, and inlet of said fan is connected to flue gas discharge branch pipe by additional gas line and to said air supply branch pipe from atmosphere.

EFFECT: invention is aimed at increasing coefficient of heat emission from flue gases through inner wall to gaseous product due to turbulisation of flows of hot flue gases and heated gaseous product.

4 cl, 1 dwg