OIL HEATING FURNACE Russian patent published in 1997 - IPC

FIELD: oil refining processes: heating furnaces. SUBSTANCE: furnace includes blast fan, air preheater and burner devices connected in series, fuel combustion chamber, gas duct, tubular heat exchange devices, smoke stack and oil and fuel supply lines. Fuel combustion chamber is made in form of cyclone fire box with tangential burners. Gas duct is made in form of circulating circuit where smoke exhauster, cyclone fire box and tubular evaporators are located. Section of gas duct connecting the evaporators with smoke exhauster is provided with two branch pipes for discharge of waste heat-transfer agent. One branch pipe is connected with air heater and other branch pipe is connected with suction branch pipe of blast fan. Tubular evaporators consist of at least two heating stages; each lower stage is provided with steam separator, level regulator and steam escape pipe unions. EFFECT: reduced consumption of fuel, enhanced reliability, reduced usage of material and low contamination of environment. 1 dwg, 1 tbl