GB1227650A - - Google Patents

Abstract

1,227,650. Radiant burners. JEAN NASSHEUER INDUSTRIEOFENBAU UND ELEKTROTECHNIK. 8 Aug., 1969 [8 Aug., 1968 (3)], No. 39843/69. Heading F4T. A radiant burner including an outer tubular jacket 4 of highly refractory ceramic material which in use acts as a radiant tube in a furnace area defined by walls 6 and 7 comprises an inner flame tube 1 of, for example, ceramic material which is carried by a combustion nozzle 3 defining an outlet of an air feed pipe 2 and which is surrounded by the outer jacket 4, a gas feed pipe 5 being disposed within the air feed pipe 2 and extending into the combustion nozzle 3, and in the downstream end of the tubular jacket 4 opposite the end surrounding the combustion nozzle 3 is tightly inserted a member 8 of ceramic material, which member 8 has a surface 12 to cause combustion gases from the inner flame tube 1 to flow into a space between the flame tube 1 and the outer jacket 4. As shown, support tabs 23 are disposed longitudinally and circumferentially on the outer surface of the flame tube 1 intermediate the flame tube 1 and the tubular jacket 4; the support tabs 23 may be offset relative to one another. The shaped member 8 projects beyond the free end of the tubular jacket 4 and is carried by a bearing liner 14. The combustion nozzle 3 comprises a metal part 21 which converges in the downstream direction and carries the flame tube 1 and connects the combustion nozzle 3 with the air feed pipe 2, and a refractory ceramic part 22 flared outwardly in the downstream direction and extending into the flame tube 1. In the modification of Fig. 2 (not shown) the flame tube (1) is provided with passages (24) spaced along and around a wall thereof for the passage of hot combustion gases.