GB1003915A - Combustion apparatus and methods - Google Patents

Abstract

1,003,915. Burners. AIR REDUCTION CO. Inc. June 21, 1962 [June 21, 1961], No. 23919/ 62. Heading F4T. A burner discharges parallel streams of fuel gas and combustion supporting fluid, and a stream of an intermediate fluid between the fuel gas and the combustion supporting fluid to delay the mixing of the fuel gas and the combustion supporting fluid. The intermediate fluid may be air, nitrogen, argon, liquid oxygen, liquid nitrogen, water or steam. The combustion supporting fluid may be oxygen, fluorine, chlorine, nitrous oxide, ozone or hydrogen peroxide. The velocity of the intermediate fluid is regulated to control the location of the burner flame and hence the zone of maximum temperature in an open hearth furnace. The burner comprises seven tubes arranged concentrically or eccentrically but one within another to form, starting at the outermost, an annular passage for cooling water, an annular passage for the combustion supporting fluid, an annular passage for the intermediate fluid, a second annular passage for cooling water, an annular passage for the fuel gas and an annular passage for air or steam for atomizing liquid fuel discharged from a nozzle on the end of the innermost tube. The ends of the two cooling water passages are closed and an external pipe connects the two passages. Partitions extend along the length of the water passages. Valves are provided to control the supplies of fuel gas, combustion supporting fluid, intermediate fluid and water. Circular passages instead of annular ones for the combustion reactants may be used.